Airport Utiity in iOS 14.0 dooesn't even offer to permit changing anything. Oh well the Time Capsule is still working, sort of. (The 5GHz band does no connect to the internet?) I don't really need the Time Capsule except for several Homekit devices that are 2.4GHz band only and do not play nice with my mesh routers. An inexpensive 2.4GHz router costs about the same as any one one of those devices which means the Time Capsule is probably on the chopping block.
"All you've got to do is own up to your ignorance honestly, and you'll find people who are eager to fill your head with information" --Walt Disney