onClientEntry not called when using `gatsby develop`

[djskinner]

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/gatsbyjs/gatsby/issues
• This issue is not a question, feature request, RFC, or anything other than a bug report directly related to Gatsby. Please post those things in GitHub Discussions: https://github.com/gatsbyjs/gatsby/discussions

Description

onClientEntry not called when using gatsby develop

Reproduction Link

https://codesandbox.io/p/devbox/elastic-minsky-n98tjs?layout=%257B%2522sidebarPanel%2522%253A%2522EXPLORER%2522%252C%2522rootPanelGroup%2522%253A%257B%2522direction%2522%253A%2522horizontal%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522id%2522%253A%2522ROOT_LAYOUT%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522clq2knou900073b6gnnugi4wd%2522%252C%2522sizes%2522%253A%255B70%252C30%255D%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522EDITOR%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522id%2522%253A%2522clq2knou900023b6gv22lnwzs%2522%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522SHELLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522id%2522%253A%2522clq2knou900043b6grfvzgr0t%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522DEVTOOLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522id%2522%253A%2522clq2knou900063b6gknky6byf%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%252C%2522sizes%2522%253A%255B50%252C50%255D%257D%252C%2522tabbedPanels%2522%253A%257B%2522clq2knou900023b6gv22lnwzs%2522%253A%257B%2522id%2522%253A%2522clq2knou900023b6gv22lnwzs%2522%252C%2522tabs%2522%253A%255B%255D%257D%252C%2522clq2knou900063b6gknky6byf%2522%253A%257B%2522id%2522%253A%2522clq2knou900063b6gknky6byf%2522%252C%2522activeTabId%2522%253A%2522clq2knou900053b6gqpbjzmq5%2522%252C%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522clq2knou900053b6gqpbjzmq5%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522TASK_PORT%2522%252C%2522taskId%2522%253A%2522start%2522%252C%2522port%2522%253A8000%252C%2522path%2522%253A%2522%252F%2522%257D%252C%257B%2522type%2522%253A%2522TASK_PORT%2522%252C%2522taskId%2522%253A%2522serve%2522%252C%2522port%2522%253A9000%252C%2522id%2522%253A%2522clq2krl8f00ia3b6gfeh1ve6n%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522path%2522%253A%2522%252F%2522%257D%255D%257D%252C%2522clq2knou900043b6grfvzgr0t%2522%253A%257B%2522id%2522%253A%2522clq2knou900043b6grfvzgr0t%2522%252C%2522activeTabId%2522%253A%2522clq2krexw00dx3b6gij8sduuj%2522%252C%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522clq2knou900033b6g7c0wf90u%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522start%2522%257D%252C%257B%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522build%2522%252C%2522id%2522%253A%2522clq2kqf0r00a43b6gnu5py9kx%2522%252C%2522mode%2522%253A%2522permanent%2522%257D%252C%257B%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522serve%2522%252C%2522id%2522%253A%2522clq2krexw00dx3b6gij8sduuj%2522%252C%2522mode%2522%253A%2522permanent%2522%257D%255D%257D%257D%252C%2522showDevtools%2522%253Atrue%252C%2522showShells%2522%253Atrue%252C%2522showSidebar%2522%253Atrue%252C%2522sidebarPanelSize%2522%253A15%257D

Steps to Reproduce

1. Run develop and check the console - note no onClientEntry called log output
2. Run build
3. Run serve and check the console - note the onClientEntry called log output
   ...

Expected Result

onClientEntry to be called when using gatsby develop

Actual Result

onClientEntry not called when using gatsby develop

Environment

System:
    OS: Linux 6.1 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (2) x64 AMD EPYC
    Shell: Unknown
  Binaries:
    Node: 20.9.0 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 9.8.1 - /usr/local/bin/npm
  npmPackages:
    gatsby: ^5.12.12 => 5.12.12

Config Flags

No response