How would I go about running Whatsapp on Librem5?

[ajlok]

That topic came up yesterday in another thread - see:

Messaging with the L5

Well, that’s going to be difficult. All data is going through their servers (meta data) and if one of your contacts makes backups to the cloud your conversations will be stored unencrypted. Anyway, you could use a matrix bridge as there should be matrix clients (fractal, dino etc.): https://matrix.org/bridges/#whatsapp