As I use a waterproof shower wheelchair, I don’t consider a bathroom accessible unless it has a roll-in shower, known as a wet-room in England. The French often call these a “douche Italiene” and the Italians call something like a”doccia filo al pavimento” (shower with a flat floor). A roll-in shower must have zero steps and room to roll in past any glass or curtain.
You can get a good example of what I mean by looking at the photos at the bottom of this page. These examples are of reasonable showers. At some stage I might include some photos of “accessible shower” failures.
My preferred bathroom has sufficient room and is practically designed but doesn’t look ugly and medicinal like a hospital.
One trick I have learned for finding accessible hotel rooms is to tick the “roll-in shower” option in Trivago.com or hotels.com. Even hotels that falsely click the “accessible” option rarely click roll-in. I notice that Trip Advisor has added the search option “Reduced mobility rooms” which seems to be more useful than the pointless “wheelchair accessible” option. Pretty much anyone who has a door will tick “wheelchair accessible” but “reduced mobility” suggests it maybe actually be adapted.
It’s also becoming less common to claim a room is adapted when it has a shower over the bath.
You can then go to the hotel’s website and check it out further.
For England, a web search for “apartment” or “accommodation”, “wheelchair” and “wet room” or “wetroom” will bring up lots of places, and there is a good chance they will actually have a roll in shower.
Some ugly “accessible” bathrooms:
Some OK accessible bathrooms: