I would also be curios where you are located. I am in EU and had a software problem (caused by self) and support was very helpful and they even repared my phone free of charge despite me telling them that I was at fault myself. Now I wonder whether one of us was lucky / unlucky or it depends on the region...
Sending it in and back took a bit longer that it could but still was within a reasonable time frame.
Ich glaub das basiert auf der matrix WhatsApp bridge. Die benutze ich seit Jahren, man muss nur ab und an die normale app öffnen, weil es WhatsApp web benutzt. Man muss deswegen halt auch dem server vertrauen weil sie da soweit ich weiss immer entschlüsselt und dann wieder verschlüsselt werden.
Hier ist der github link: https://github.com/mautrix/whatsapp