Power Manager is documented as available for 955, but it's not fully functional.

Waiting for this too, was hoping it would show up in the beta software

sadly, i think this documentation is correct. previously, if you looked at the manual of the 945LTE, there is a suggestion of some Power Manager features including one where the watch can be set to go into Battery Saver mode during sleeping hours (eg, using bare bones watch face, disabling BT, etc.) in the owner's manual. i inquired with product support multiple times and they at first thought i was missing the setting because the manual mimicked what the Fenix 6 could do. however, ultimately, they said my watch was doing what it was capable of doing and that feature/option was not available. this new documentation seems to cement that vantage point, much to my disappointment. (i sold my 945LTE for my friend).

i hold out hope that the power manager will come to the 955 Solar (seems that they would want to provide this feature to owners who paid top dollar to get the most battery endurance), but i'm not holding my breathe.

It’s still with 12.23 crippled! Only a function limited battery saver profile.

I missing most the battery saver “during sleep” function and low battery alert off.

And for example downhill skiing I think a jacket mode is needed.