@Psspsspssssss You make very helpful points but also, I feel, you need to cut to some slack to school leaver apprenticeships moving away from home, and their parents like the OP.
I have two DC who moved away to different cities at 18 to take up apprenticeships. Both are very independent and 'can do' but nevertheless found the sourcing of accommodation to be challenging.
Most agencies, landlords, potential fellow lodgers etc assume school leavers live at home and that if you are looking for accommodation you are either a FT student or a 21-22 year old grad, when actually you are neither. My DC had to do a lot of work challenging assumptions and perceptions to get the accommodation they wanted.
In addition, they were experiencing a crash course in understanding 'how to rent' during and immediately after their A levels, so it was tough from that perspective too. Unlike first year students clubbing together to view lets in their uni town, mine were travelling solo over long distances to view properties.
I don't think it is unreasonable for the OP to be posing the questions they have posed and trying to assist their DD. I am philosophically a fairly hands off parent but accommodation hunting was one area where my 18 year old DC found direct guidance was quite important.
I do agree that employers are quite laissez-faire; though, interestingly, my DCs' respective employers have improved the facilitation of info sharing about property hunting since my DC joined, so there is some recognition this issue needs to be addressed.
Finally, OP, there was a MN thread a couple of years ago where another poster flagged this accommodation as potentially helpful in this kind of situation: chesterhouse.org.uk/