Don’t forget that the IFTTT applets are just based on code using their API! If you are able to do some basic programming you could create your own custom programmes.
Via the API you can access and move money between your pots!
Some nice people on the internet have created some useful tools to help access this whether or not you’re massively programming literate, such as muyiwaolu on GitHub.
I’ve created a setup in Node-RED to do some automatic stuff with my Monzo, such as moving what’s leftover of my weekly budget into a pot when a new week starts. I’ve started to upload these onto GitHub to hopefully help others
Hope this is vaguely helpful considering the hole that Monzo seem to have put us in with the IFTTT support