Hi Sanjana! It could help to understand why this is not working in system: Percona-release enable psmdb-40 release Specified repository is not supported for current operating system!
If this is not your case now: As I see in the screenshot “docker ps -a” that percona/pmm-server:2 has STATUS: Restarting. It should be “UP”, to see more about its logs we could execute the next command:
docker logs --tail 50 --follow --timestamps <HERE THE CONTAINER ID>
We can have more clues about what is happening in Ubuntu 20.
If you are still with this issue, please share those logs, we will be happy to help you.