Is there any way to connect the watches to phone when I change the ROM on the phone? I often clean install various ROMs on my phone and it is annoying to always reset and pair the watches again.
Yes there is, here's a link explaining how.
I have a Nexus 10 running CM13 which does not have the correct sensors (or maybe they aren't activated?). I have found a few apps on the play store that are usefull.
GSam Battery Monitor allows you to track how much time your device has been in ...
I only wanted AW2 for the keyboard feature and the play store on the watch. That was the main feature I saw of it.
Apparently Gboard for AW2 can be sideloaded onto AW1.5 via ADB. The apk is available on APkmirror here
I also have a answer where i can get your modded Magisk ?
Maybe you could explain how this is done? I'm not familiar with this process.
In TWRP select Install, click at the bottom right Install Image. Find and select the gsi img file, you will be given a list of partions titled Select Partition...