Why don't we have battery percentage as a regular data field on built-in watch faces? Yes you can have an arc with battery percentage on specific built-in watch faces, but why not a regular text data field? Even Instinct 2X Solar has it as a regular text data field.
Showing battery estimation time is absolutely useless. I've used Instinct Solar, Instinct 2X Solar, Forerunner 965, tactix 7 Pro, and fenix 7 Pro, and the battery estimation time works on none of them because it seems to be hard-coded rather than calculated based on actual usage.
Honestly I don't see this as a feature request, but a feature loss that needs to be addressed.
Update: See the answer from #Matthias#. Disable Battery Estimates in Settings > Power Manager.
