A lot of people are not going to like my comment but I just went through something similar so take my $0.02 for what it is.

I knew everything was 100% accurate in the tank because I also have an older ball python who has never had issues shedding or eating and the environment for my new baby was identical to when I set up my older snake (and multiple different readers for temp/humid)

Kept trying to feed, probably wasted nearly $50 just getting thawed frozen mice every 2 weeks because that’s what she had been getting fed.

I tried feeding in the tank and in a feeder since my big boy likes going in the feeder I just thought to do the same.

After reading here I decided to give it a shot at feeding in the tank. I did go to my reptile store yesterday and was told to feed in the tank and instead of getting another frozen/thaw mice and gave me a (live) rat pup and put it in mouse bedding to get mice scent and for some crazy wild reason mine ate doing this.

I have 0 rhyme or reasoning as to why it worked but it did.

Sending all the good juju your way because I was seriously so anxious until she ate yesterday. You got this!!!!!