Lee holden 7 minutes of magic, Qi gong.Its very gentle ,I struggle with reaching so I just do what I can.Its an old video but good

Look up chair yoga. It's very gentle on the body

There actually are several muscle strengthening exercises that can be done laying in bed. I went for physical therapy a few years ago and he worked with me on them. As he pointed out you need to build up strength in muscles before you try to build up muscles. Most insurance will pay for physical therapy. If that's not an option let me know and I will share what I know.

Chair yoga and tai chi are good, gentle options that do help💖

And I will pick your brain soon, Elephantcat!

I tried water physical therapy.
Some things i liked about it , but overall I had to stop.
I was suppose to go 2-3 times a week but I could only mange 1x a week because I felt o beyond beat up etc and took me that long to bounce back.
I'm pretty sure my therapists must've confused my file with someone else's , ha!