Yes! The SentinelX can STILL work with Sentinel Sharing.
It can be added to a COIN Account with a physical BridgeX even if it is appearing as "Claimed" in the XYO Network App.
There is currently a known bug with the SentinelX and XYO Network App, where adding, removing, and re-adding the SentinelX can occasionally mark the SentinelX as "Claimed". See what you can do here: Help! My Sentinel says it's already been claimed. What do I do?
The sentinel can still bound witness when you're using the XYO Network app, and you can still use it to geomine with COIN.
In the meantime, it won't affect your functionality except that you won't be able to make changes to the sentinel or see it in your account, meaning that the only things you can't do are give it or name or set its password.
You also can still use the SentinelX to activate Sentinel Sharing in the COIN App.