In the "Summit for Lemmy" app, if you go to a community that you moderate, click on the three dots in the bottom right corner:
then when the Community options pops up:
tap on "Community Info":
Which will give you the "Unsubscribe" / "Instance Info" options, as well as the community Header/Profile Image, Description, Stats, etc.
If you then tap the three dots in the bottom right corner, you end up with the option to edit /delete the community.
PLEASE add a feature similar to the Community Edit/Delete for Voyager.