I'm not an expert and that still might be the case but you have to understand that for many Microsoft as an American company is simply no longer an option for critical infrastructure. It's a matter of trust.

Most companies that I know that allow employees to use Linux laptops, IT washes their hands of any kind of support.

While anyone with macOS or Windows laptops can open support tickets, the hardcore Linux users get invited to join internal forums to help themselves.

Thus naturally one needs to be really into it, especially when dealing with software that doesn't even exist.

So we get our IT supported systems and run GNU/Linux either on servers or VMs.

I sense only if there are changes imposed at governments level, would companies change their stance on this.

That can work, but it creates other kinds of problems in some companies. The point of the IT dept is to avoid spending engineer time on fixing random laptop issues, and also to deal with the monitoring software that has to support every OS the employees use.