you might consider Oil pulling with extra virgin coconut oil first thing in the morning which has helped many with this issue. There’s a link in protocol about it, rather easy. I’ve also heard of swishing probiotics or even gargling probiotics mixed in water as a method which helps.
However, many report what is termed “oral thrush” to resolve as they work the protocol.
Personally, I include brushing my tongue as the last step to brushing my teeth every night and it helps a lot but, when I cheat dietwise, it can come back.
Many healing blessings on your healing journey and wishing you holiday graces to you and yours.