Version 2022.04 supports great new features to create groups from the UI.
However, is does not seems possible to create a group from input.boolean entities (helpers).
A group of input.boolean entities can be created via YAML but it would be very nice if this was also possible from the UI.
Hope I am not overlooking a feature I not yet discovered. 
I think that only selected common domains were included in this release, the big one that seemed to be missing for me was the “person” domain. Hopefully other domains will get added in future releases.
Could really use grouping input booleans from the UI right about. Waiting for a raspberry pi 3 to reboot is painful. Been trying to snag a raspberry pi 4 for far too long. :\