The 3 choices for selection to enchant items never changes.
I mainly play on Win10, normally on a realm, but this also occurs when I play any other maps on win10, and trying the same on android.
The enchant options vary for each item type, but they always remain the same, even if I enchant items.
I've tried the following:
trying a different table
Logging out of the realm / map
clearing the app data
uninstalling minecraft
joining a friends map to enchant an item
Disabling multiplayer
Not sure what else there is to try. It sounds similar to other bugs in the past that have been marked resolved, but couldn't find an open issue that matches. If I had to guess, the enchanting seed is stored on a server tied to my xbox live profile, but that's just a guess.
Yeah, unfortunately mine don't even change as normal.
Some additional information:
When I am logged onto a map / realm, everybody else's enchants are also stuck, like mine, but if I leave the server, and they relog (or if they join when I'm not connected), they can enchant normally.