If I draw a Pokemon with the "Top Entry" Ability during my first turn of the game, can I put it onto my bench right away?
Sure, but remember you must do this BEFORE it gets into your hand.
Source: Rebel Clash FAQ (2020-04-18), TPCi Rules Team (2020-04-30)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH2_32
SWSH2_32