Can I use 2 runs of 10/2 UBF for my Shed 90’ from House?
You can't run 2 separate circuits of the same type to an outbuilding.  

If they are 120V circuits you could run the two as a multi-wire branch circuit, which counts as 1 circuit.  You would need 10/3 cable for that. 

Alternately, you could run a 10/3 or larger cable and feed that to a subpanel.  That may be more of a production than you want to get into, because it'll mean selecting a subpanel with a main breaker*, as well as driving two grounding rods. 

* Actually the purpose of the main breaker is to be a disconnect switch.  You need one.  Choosing a main-breaker panel is the cheapest way to obtain this. You don't care what the value on the main breaker is.  It could be 200A for all you care lol.