If the left hand corner-y thing is the shower, I would move the shower to where the tub is, with a squared off front. Leave the right hand sink where it is, but move the left hand sink down to make use of the wall where the (possibly the shower) is now. (Assuming the sink counters would butt into a new straight shower wall.)

Measurements would be helpful.

I would put a tall armoire (or a cabinet that matches your new vanities) to hold a laundry basket, towels, and toiletries. There is enough room to put towel bars on the walls on either side. (I got rid of the angled wall.)

Are there any windows?

Can you move other plumbing? If not I would line the walls with storage and mirrors.

Thank you all for the great suggestions! Yes, replacing the tub with the shower is a great idea. Could make a closet out of old shower. Houssanon, we were surprised to find out there is nothing important behind the back angled wall so we will remove it!! Having one less angle will make the designing easier. Thanks again all for taking the time to help with our project!

Here is potential layout. Each square equals one square foot. Large walk in shower with half wall on left end. A niche could go into that wall for shampoo etc. Drawer units below counters. 2 sink areas. A tall to ceiling linen cabinet to left of door. A above corner angled corner storage cabinet. Add plug inside for hair dryer, flat iron etc. I left WC where it is t keep cost and mess from moving sewer line. 🌞 I would add plenty of lighting both on or beside mirrors a pretty chandelier in center of space and outlets on all vanity areas.

After looking at this, I would change the shower door swing so you could put water handle/valve on left half wall and open door without having to reach in and get wet when turning water on! Opps!!

Thanks so much Flo for all your time and effort on the bathroom plan! Love the layout! really good use of the old shower space!

Here is revised shower door. Now you can open shower door and turn hot water on with quick exit while water gets hit! Lol

I assume you know the little box shapes coming out from counter are drawers.