At my workplace we only use WhatsApp for personal comms. Like chatting about which restaurant we go for lunch, who's at the office tomorrow, when is everyone's birthday, what did we do this weekend, that kinda stuff.

For work related stuff we use teams and that it's kinda needed too because we can only link to internal resources there, like SharePoint.

I mean at least you have teams as an alternative.

Where my wife works they simply have a WhatsApp group because there _is_ no messenger, and while they don't use it for work stuff, they couldn't even have anything but group emails for discussing lunch plans or reaching someone who is not present at the office without calling (and in the case of reaching someone, they don't have access to anything on personal devices and they 90% have no work phones).