I feel you. Had come into lockdown with a laundry list of stuff I though I could finish because of gained time. Very little has materialized. A thing that helped was bringing in another person to check on each other.
You may badly want to be one of these people who emerges from lockdown in an amazing new body with all of these projects completed but you shouldn't feel like a failure if you couldn't. This was not a normal time and adding pressure to be productive is not the answer for everyone.