I have two of these clear Rubbermaid wastebaskets under my bathroom sink. One is for garbage and the other is for wet washcloths. Works great. Here is a link that might be useful: Rubbermaid wastebasket.

looks like there's a medicine cabinet off to the left. it's hard to tell in the pic, but it seems like it would make it even more difficult to stand comfortably at that sink. what if you removed the cabinet, and placed a small mirror instead? if you need it to be a medicine cabinet, consider one that's recessed into the wall. make up for the loss of storage by adding a cabinet above the toilet. remove the mirror off to the right, it's awkwardly placed. of course you have a lack of counter space, so install a couple of wall mounted dispensers under the new mirror. try to find something that doesn't stick out too far. fill one with soap, and the other with hand sanitizer. like this (from etsy): or get two of these(from etsy):

I'm sorry you don't like those tiles, but I can tell you, I would select those tiles TODAY (if they were even available) over the ubiquitous grey veined marble or marble look tile bathrooms we see here every day. It's a beautiful bathroom. The windows do not bother me at all; I much prefer them to something that has window coverings for privacy that block all the natural light. They are somewhat reminiscent of chapel windows and feel almost reverent to me, and calming. There is something natural and organic about tile over the quartz that is being used everywhere these days (plastic). I bought a house built in the 1980's that had beautiful trim tile which looked as if it could have been hand painted. But it had kind of a pinkish beige background with simple pink flowery designs on it. I detest pink, so I couldn't wait to change it out. I finally did that in 2022, lol! I understand not loving something, but living with it sometimes is easier than we can imagine.

I would cut the copper pipe off before the closet bend (the elbow) and use a shielded (a.k.a. mission) coupling to transition to PVC and install a new PVC flange on top of your new subfloor (I prefer the ones with stainless rings). Crazy to see copper used for drain-- it would cost a fortune to replumb it that way that today. Be sure to save any copper you cut out for the scrap yard-- they pay about $3/lb. Brass too.