Oh well. The whole thing has already been reverse engineered. Look up Loop or Trio or OpenAPS. Diabetic companies like Insulet have been very lax when it’s come to the hacking of their devices. This isn’t really that big a deal. What we need right now is help REing the Omnipod 5
Not all though, I've been looking at Minimed pump reverse engineering (which would be just reading glucose data, not controlling the pump), and that's not solved yet, at least not for the 780G. But I hope it will be, and perhaps I'll be able to contribute.
I’m aware of a few people working on REing the Omnipod 5. The furthest issue that I have seen is that when a PDM/Omnipod 5 app signs into your insulet id, it gets a private key from the API which is stored in the keychain (and uses SSL pinning to prevent MiTM retrieval of the private key). When pairing with the pod they exchange public keys and then a derived key from the devices private key+pods public keys, but haven’t been able to get a copy of a private key yet to make further progress.