Unable to update from Ubuntu 20.04.6 LTS to Ubuntu 22.04 LTS

I am unable to update from Ubuntu 20.04 LTS to Ubuntu 22.04 LTS.

Getting below info for lsb release and do upgrade command -

lsb_release -aNo LSB modules are available.Distributor ID: UbuntuDescription:    Ubuntu 20.04.6 LTSRelease:    20.04Codename:   focaldo-release-upgradeChecking for a new Ubuntu releasePlease install all available updates for your release before upgrade

What shall I do ?