High D Dimer & IL6 after covid treatment

Hello, My mother (76 years old. a cancer survivor since 2014 and has diabetes) tested positive for covid 19 on 4th of August. After that she was admitted in hospital and spent almost ten 10 days in ICU. Now she is out of ICU since 18th August but still admitted in hospital. She has become very weak and is as good as bedridden. Her oxygen concentration for last 10 days is around 96-98 but her pulse rate is very high. Around 105-110 when sleeping. Her latest d Dimer value is 3700 and IL6 level is 57. Doctor over here is saying that she can be discharged since she no longer is a covid patient. Her other problem such high sugar levels and limited mobility can be managed at home. I'm not convinced that with such high inflammatory markers she is ready to be discharged and go home. Can you please advise what should be my next steps. I'm little overwhelmed.