Letīs put it this way:

2022 car rules were made long long time ago

Do you really believe that lack of "quite small hybrid component" is the reason that Teams havenīt started building their 2022 cars ?

6 months testing could be enough but why every Team is just "waiting", only because of that missing Hybrid system ?
FIA for sure has delivered all tecnical information about it to Teams (weight, size etc.)

I hope Iīm totally wrong with my "stories" but we will see...