do you have a proper floor plan of the space? Who is doing the work for you? Tile is all about proportion and based on limited info, it doesn’t look like you have space for a shower unless you are getting room from somewhere else? More info needed for sure.

There’s room - I’ll get a better layout drawn up later today. Were having a contractor do the work

"A contractor" should never ever be doing a 20K steam shower build. You need a tile professional who understands how they are built, because they are different beasts than a standard waterproof shower. You do not just add a steam generator. Every single thing has to be water vapor proof. That's a big step above standard waterproofing, that most contractors do not even get right.

Our contractor subs it out to the correct people I’m not worried.

“Help! My contractor didn't do XYZ, and now it looks terrible!!!!!”

Not to be rude but I’m just asking for color/tiles ideas and input. Not contractor input

You may want to hire a kitchen and bath designer. Designing a bath is much more than just colors and finishes! There are a great deal of safety considerations and building codes involved. For instance, plumbing centers. Your indicated 20” vanity will not meet the code requirement for 15” on center to the nearest side obstruction. That is code for all plumbing fixtures, including toilets and showers.

All building code, etc is being used for this remodel