whatsapp requires phone numbers. surely they can be called

Sadly the phone number is only for messages, in most cases it's automated with a bot giving you options.

if you have tech skills, try running a matrix bridge

I didn't know about matrix bridges. To be honest i'm not familiar with matrix but i have been learning about networking and self host on the side. I could make it part of the project.

Thanks for the suggestions! I should interact more with the community, i have been receiving lots of good feedback recently, i was always a lurker on reddit.