Sounds like it does suck! The only things that spring to mind for me - apart from do more of whatever you were doing in Lockdown - is that my guinea pigs can highly recommend strawberry flavour Complan. It's supposed to help underweight people gain weight and it's the only thing my guinea pigs will take from a syringe when they're really ill, and they don't like the healthy crap that the vet gave them.
Apart from that, carbs, but you probably know that. I would also say cake, as it seems to work for other women, but it's not the healthiest advice. 😄
I hope you find a solution that suits you.