End of life guilt and depression. Can someone help?

Some may have seen my previous post where I lamented this corona virus hell. My Dad is in late stage been in an ALF since October, prior to that he was hospitalized for kidney and pneumonia when we made the heartbreaking decision after 9 years of home care to place him as my 76 yr old mother couldn't do it anymore. We went daily. We provided the care as they were understaffed. This past month he declined even further. Became mostly immobile and mostly non verbal. Showed signs of high agitation with constant clapping and slapping his hands. Because of the ban we had to go 15 days without seeing him. I was very concerned with his lack of eating and drinking and the fact we weren't able to see him and help. He lost 10 lbs in 15 days. He landed in the E.R Sunday a.m. after they discovered a massive fever and then ICU for severe dehydration, kidney failure and pneumonia. The heart too was in critical condition they were able last night to stabilize. They told my mother that he is hospice eligible she has chosen to stop all meds and do comfort care..we were told he could pass in days. I'm a wreck. I'm not sure if this is the right course of action? We also still cannot see him yet because of COV 19. My heart is aching over him passing before I can say goodbye. I'm devastated. Has anyone else had to make this choice? Is this the best choice? Feels like giving up Please help.