Having served on a parish council there can certainly be a technology challenge for some.
There are services which will do the work - https://cuttlefish.com/local-councils/ - https://www.parishcouncil.net - are two of many. These have their drawbacks, may not provide exportable data so locking the council in. Some will allow direct access, some require that any new content be sent to them and they upload it.
Some councils will own their domain name, some will not. Then there is the email issue and many will use a gmail / hotmail address.
Cost, especially these days, is also a factor.
I don't see it as a bad thing to have so much variety though.