What's the point of having @passmail.net aliases to hide&forward e-mails to your @proton mailbox if you can get spammed on your phone number registered on the same website ?

I'd want a Proton SMS Forwarder app that would have the following features :
1° Transfer SMS, MMS and push notifications to my proton mailbox / to a dedicated proton cloud / to another phone ;
2° Transfer through smtp / api / WIFI (not onty through 4G/5G, except for MMS obviously)
3° App on Phone + PC Desktop version with a SIMCard Reader / eSim
4° Where possible : possibility to create virtual phone numbers per Country on a Proton portal, that could be used to register on websites (for 2FA authentication or other). I don't trust all those free online services (the paid ones neither).

I'm ready to pay for it. Thank you Proton devs : )