In doubles pickleball you may hit the ball twice on your side to get it back to the other side.

this is for gym is its true or false

I'd say false because I think of it as a doubles version of any game has two players; therefore, you would not need to hit it twice because you'd have someone else next to you to hit it when you couldn't.
Think of doubles tennis - two players on each side. If player A on one side cannot reach the ball when it is hit their way, player B on that same side will hit it.