How to add the googlemaps plugin in QT6 :
Add project googlemaps in QtCreator
git clone https://github.com/vladest/googlemaps.git
edit googlemaps using the attached googlemapsOffline.diff file.
open project googlemaps
Build project googlemaps for all configurations in QtCreator
with linux: Drop the libqtgeoservices_googlemaps.so file in Qt / 6.5.0 / gcc_64 / plugins / geoservices
Drop the the files libplugins_geoservices_qtgeoservices_googlemaps_armeabi-v8a_armeabi-v8a.so and libplugins_geoservices_qtgeoservices_googlemaps_armeabi-v7a_armeabi-v7a.so in Qt / 6.5.0 / android / plugins / geoservices.