Google introduced changes in the Wear API that deprecates all the classes currently used to implement watch faces.

https://stackoverflow.com/questions/59182586/does-androidx-contain-replacements-for-wear-os-classes-like-watchfaceservice

https://stackoverflow.com/questions/71259574/gles2watchfaceservice-deprecated-what-now

https://developer.android.com/reference/androidx/wear/watchface/package-summary

https://developer.android.com/training/wearables/watch-faces/service

Updating to the latest version of Wear will probably require a significant rewrite of the watch face functionality.