I’ve read about preload issues but they were done about 15k miles ago (if I remember correctly) by the PO
If bearings were adjusted correctly with sufficient preload, they should still be good after 15k miles
On the other hand, I've had bearings become excessively loose after less than 1500 miles.
It's easy to get right, and easy to get wrong, depending on method used.
I no longer follow the FSM method.
There's loads written here about an alternative method for setting bearings up right.