Able to but not willing to use her tongue so she chomps

I’ve posted a couple of times about my LO (8 weeks) experience post tongue tie release.

Basically she had the release but she STILL does not know how to suck - today they told me that because I have a strong letdown and lots of milk, she is NOT motivated to learn how to suck. The IBCLC I met told me she’s never seen a case like this and apologised saying that there’s nothing else she can suggest (we already had the release, had some osteopath sessions, and are doing tug of war and side to side exercises with her tongue). I’ve tried looking for a PT, OT or SLP in my area (Wales, UK) that could support me with further exercises for her but haven’t found anyone.

People keep telling me not to worry and that she’ll eventually figure it out but I’m not sure why she would do that if she’s getting lots of milk while chomping. My metal health has taken a big hit because of this and I don’t think that pumping would help as I hate the hassle of the bottles/pumping because she’s a high needs baby that needs contact naps ALL DAY.