Is a dental hygienist qualified to remove my 2 temporary cemented implant crowns to then permanently cement them? hygienist asked me for the ok.

Yes/no: To remove yes, to permanently cement no. You can always check with the state rules but I am not aware of any state that would allow them to permanently cement crowns.....especially implant crowns that need proper fitting and torquing of the implant itself. No worries

Expanded duties: Each state is different, and it depends on his/her training and certification. I would let your dentist cement the crowns in this situation.