Yes it does. But the charging speed decreases to 15 watt fast charging in my case from PD when using it also with charging.

Hallo..i think every power Bank can be in cahrge and at the same time recharing other devices ..
About if you can use it as an UPS ,i never had this idea in my minde :)
this power bank its really fast to charge any phone ..but the problem even its having 20.000 W but will be fast empty , thats with my experirence ..
Any way you can cahrge it very fast with adpater till 120 W , will not be warm , because its having Graphene not lithium ...
Sincerely .