Unlock HSS on a6500, bypassing shutter speed limit of 1/160

[KabiMode]

Hello!

I am trying to use my on-camera flash as a trigger for an off-camera, HSS enabled flash. I want to bypass the cap Sony has on the shutter speed when using the on-camera flash, as I do not care that doing so would usually create an inconsistent exposure.

This is either a feature request or a request for anyone to tell me the name of the setting that controls the cap of the shutter speed with flash (if it is such a cut and dry solution)

Thanks for reading!