We  need  to  confirm some questions regarding your mom sir  regarding  vaccination,?  And  if not  done then  docs  might  need her long term treatment for her as she  has  almost all comorbidities sir  so  they need  to  treat both  covid  and  her  comorbidities  so  that  she  should not  involve multi organ  problems sir. So  better  to  trust your  docs  and  if you  have  any  doubt then  you  can  ask  on practo. Along  with your  proper reports.