Does she have her own bathroom? What about a kitchen?
Antibac spray for the shower and flip flops if shared.
Latex gloves so if she has to share a kitchen she isn't touching anything.
Talk to the uni about a kettle, electricals have to be PAT tested, some unis will PAT test for students others will only allow the a kettle they have provided. Also ask what their plan is for self isolation.
One of those huge bottles of water in case she is isolating without a kitchen / bathroom.
Agree with thermometer and pulse ox, it's not a bad idea to track those on a daily basis.
Extra bed linen and fit it to the bed, so the bed has two sheets on and the duvet has two covers, if you are ill (with anything) a clean bed is wonderful but you don't have the energy to change it. Just stripping off a duvet cover and sheet is doable and you will have fresh underneath.
A message board, portable white board and marker, it can be stuck on the outside of the door with blue tack and dd can write messages to flatmates eg "Day one self isolating, I'll use the kitchen at 12.00 - 12.30 leave me a note if not convenient"
I'd personally also send some small wrapped presents, if she has to self isolate she can open one every other day, if not then she can open them at Xmas.
Oh and don't forget sanitary towels / tampons.