Apparently, there is no official solution, but I have found some third-party software which claim to do so. Most of them seem suspicious at the very least.

Does anyone know if it's even technically possible to restore Android Whatsapp backups on an iPhone, and if so can recommend me some options (private message if you want)?

Not a very HN-like question, but it's the final resort because here I'm sure that people are legit and tech-savvy.