The shower is quite badly done. The enclosure doesn't go up to the ceiling so steam will billow into the room and cause damp. It's possible to ventilate a shower enclosure well, provided it is closed in and you have the right type of extractor.
As far as I can see you couldn't roll a wheeled shower chair into the shower tray. There may be a perch of some kind at the far end. I don't see grabrails or hoist so it doesn't look like a good disability conversion, and it's more usual to put an Accessible room on the ground floor.
it would have been possible to install en-suite facilities with basin, WC, roll-in shower and enclose it much better.
It looks like quite a bit of money has been spent on it but I think the shower is not a good job.