The Young Survival Coalition is a resource she could consider. My cancer center offers groups and classes (unfortunately a lot went virtual due to Covid and haven’t gone back to in-person yet), therapists and nutritionists.
I found nice bralettes and tanks at BustedTank.com. Comfy, step-in or pull on overhead, easy care. The fabric hasn’t irritated any of the mastectomy scars and just the right amount of coverage.
deb922 - hugs to you and your daughter.
During my chemo, I found drinking was most important - including Gatorade (for the electrolytes). If I went too long without drinking then I’d stop wanting to drink (ended up w/IV fluids a few times).
Hugs to your daughter and to you.
One thing I would suggest. When dealing with a genetic counselor or any medical professional or procedure you haven’t dealt with before, take some sort of recording device with you. Ask if he or she minds if you record what is said. I say–which is honest–that I don’t always “get” all of what was said the first time, so I like to be able to go back and listen again.
That is true…but what I’ve learned is that when someone knows they are being recorded, they suddenly start explaining things very, very clearly.
In your case, since your H is apparently unable to grasp everything at once, partly due to a hearing issue, it might be especially helpful to have a recording. He can turn up the volume and play the parts he’s confused by again.
I may not have mentioned this and if I did, 
I did get tested for the gene mutation my daughter has. My daughter was insistent so I called my local genetic counselor. She called my daughter and then her embryogist, got the information why the test was needed. I was able to schedule a abbreviated appointment and have the test.
My husband’s testing has not come in yet, should be soon. I will be very surprised if he doesn’t have this gene mutation
Again very thankful for the support here and the tips.