Like resource packs have an update button, an update button for datapacks would be fantastic. Also clicking on the datapack in the list could take you to the listing. I'm using https://modrinth.com/mod/packrule-menus to access the datapack menu within worlds, and having an updater button would be fantastic

The reason there is no datapack updating is because, by default, you can't open the menu or change the datapacks again. Adding support for some datapack mods like the one you sent and the one in #67 is definitely something I'd like to do in the future, but unfortunately I currently don't have a lot of time so it could be a bit.