Wheel balance weight loss usually starts to be felt at speed.
Wheel bearing wear, is a constant and felt as per your description. One check is running a dial gauge on the rim or disc, but from your description and without riding the bike, it sounds just like early onset of bearing failure. If in doubt replace. Sticking your finger in the bearing centre and rotating may not pick up early wear which would give you the sensation felt.
The front wheel bearings are expensive as compared to the back, but go to a bearing specialist and get SKF, original install make in my bike, and they’ll cost less than a KTM dealer.