@tstefanelli, welcome. Clearly, you are worried about your sister. She has been through so much and is still struggling with COVID infection as well as antisynthetase syndrome. I'm hopeful that @jamieray6812 and @nancykay1888 will return to share more with you.
It sounds like she needs the care of a multidisciplinary team. Might going to a large teaching hospital that has expertise in post-COVID, transplant and autoimmune diseases be a possibility for your sister? Are you able to visit her?