Finland. Wa is rare in business use of any sort. My employer bans it for anything work related as do many others. I’ve seen maybe one hands fingers worth of businesses with a wa front.

Various associations and clubs do use it for group chats, though.

Also, absolutely not. And you should never trust anyone who says anything like “in Europe” or “Europeans”. It’s a continent of dozens of countries and cultures many of which have been in war on and off for centuries. There is absolutely nothing that is uniform across all of Europe.