What color headboard do you have? What color grey for the walls? Sounds lovely!

To me, the floorpan seems to make sense as it is. You could extend the bath slightly into the bedroom to give you a longer countertop space, about where the wall of bedroom2 runs, but you need to know if that works with your bedroom furniture. You could also slide the shower over to the back part of your closet, accessed from the shorter end, to slide to toilet down and have more countertop. It depends on your priorities.

My contractor replicated the original baseboards in the rest of my house. Original hall baseboards Addition master bath above sunroom Powder room has no base board molding at all Kid’s bath has a original tile baseboard

You have another option for ideas, and a good contractor can help get you to the finish line. https://www.architecturaldesigns.com/house-plans/400-square-foot-one-bedroom-cottage-560009tcd Set the filter for 1 bedroom, 1 bathroom, 1 floor, and scroll through the ideas. I bet you find one you like. If I were Mom, I wouldn't like my bed out in the open where friends might drop by, but I would like a bistro table and chairs in my room if I were bedridden. And a nice view would be nice, but not too open, because I get afraid of the dark as I age.  If I were Mom, I would want my bed so far from the toilet. If I were you, I'd want a small kitchenette to heat and refrigerate leftovers. A small laundry closet might come in handy. Look at the designs and see what could work and what you like. Then, see what your contractor thinks. See what Mom thinks. Run it past us if you want.  Tell us more about Mom's condition and long term plans.