Mmm it is obviously not nothing to you if you worry about halitosis.
I would of thought it needs treatment I would go back if it were me, some gps give lozenges to suck containing ingredients to rid it. Although mine don’t give that they gave the nystatin.
As good mouth non alcohol mouthwash helps but it does tend to mask it it needs to have hydrogen peroxide in it.
Have you cut down on sweet things, that’s why I think I got mine too many treats lol and now I am paying the price.