Ours came with a two handled faucet. Water pressure was horrible bad. Here's what we did...
Remove the flow restrictor from the body of the faucet base where the shower handle screws in.
Replace shower handle with Oxigenics Fury RV Shower (ordered on line since RV versions are not often in stores.
Added a screw-regulated water pressure regulator with guage, so that I could always know that I'm pushing enough water up to or a little past the 45lb suggested limit.
https://tinyurl.com/yybbrfcs
We kept the original shower base and just used the oxigenecs shower handle. I had to file down the flutes in the tapered handle holder holster in the old unit in order for the handle to stay in without falling out.
Showers are much nicer now!
-Angus