This appears to be the key problem:-
The following packages have unmet dependencies:
nginx-custom : Depends: nginx-common (= 1.18.0-1ppastable1ubuntu20.04.1ppa1) but 1.18.0-4+ubuntu20.04.1+deb.sury.org+1 is to be installed
nginx-wo : Depends: nginx-common (= 1.18.0-1ppastable1ubuntu20.04.1ppa1) but 1.18.0-4+ubuntu20.04.1+deb.sury.org+1 is to be installed
E: Unable to correct problems, you have held broken packages.
Some Googling around "Unable to correct problems, you have held broken packages." may help.