My kid just came home so I have some recommendations, OP!
ViscoSoft mattress topper Has a washable cover, smell dissipated within a week, kid (with bad back, takes Celebrex) liked it and taking it back next year
https://viscosoft.com/products/three-inch-mattress-topper?variant=39670601318497
Brooklyn Bedding Cooling mattress topper, because I was worried the mattress topper would be too hot. I personally didn't care for this because it is "slippery" (I tried it out because I sleep hot), but kid liked it.
https://brooklynbedding.com/products/luxury-cooling-mattress-protector/twin-xl
Collapsible laundry basket is great for transporting clean, folded clothes and carrying clean laundry back to dorm room. I guess you could put dirty in it too, but my kid preferred a bag for that.
https://www.amazon.com/gp/product/B09DR8QBJ4/
A woozoo fan is good for small spaces
https://www.costco.com/woozoo-5-speed-globe-fan.product.4000230071.html
This detergent is great. Very concentrated and small bottle. Sometimes crappy dorm washers don't get hot enough to dissolve the laundry pods, so this is a good alternative. We only use the unscented, though, because the one scented one we tried was gross.
https://www.target.com/p/seventh-generation-free-38-clear-ultra-concentrated-66-loads-laundry-detergent-8211-23-1-fl-oz/-/A-76158733#lnk=sametab
Also, I read that the trick to getting a minifridge that works is to never, ever tilt it too far or turn it on its side or back to carry it. It needs to remain upright or the refrigerant (or something) can leak out and then it will break. You should also let it sit upright for several hours after moving it before turning it on. Overnight is good.
Finally, find out from current students what the wifi is like. My kid really needed an ethernet cable for some things (like gaming, but also on class registration night when everyone was logged in at exactly the same time)