As with xenial (see Comment #11), my focal verification just shows that booting under SB still works:
ubuntu@dannf-shim-f:~$ dpkg-query -W shim-signed shim-signed 1.40.5+15.4-0ubuntu5 ubuntu@dannf-shim-f:~$ sudo mokutil --sb-state SecureBoot enabled
As with xenial (see Comment #11), my focal verification just shows that booting under SB still works:
ubuntu@ dannf-shim- f:~$ dpkg-query -W shim-signed 15.4-0ubuntu5 dannf-shim- f:~$ sudo mokutil --sb-state
shim-signed 1.40.5+
ubuntu@
SecureBoot enabled