https://www.zdnet.com/article/micro...office-pwas-for-some-windows-10-users-report/ This showed up on two of our lab machines as well. It seems at the least to be a tad aggressive.
Keywords being "MS is testing this selectively among some Windows 10 Insider customers". So at this point it could just be "let's see if/how this works" with their insider volunteer beta testers. If they plan to do this unannounced for non-insiders, I fully expect a pretty big blowback. I mean people are already freaking out because they cannot install the Game bar app.
I don't totally disagree my issue is with how they went about it. At last in our case there was no prior notification, they just showed up and we couldn't figure out ho they go their since none of my folks remember installing them. And so yes we are an edge case, but know the precise state of a machine is crucial to our testing. That being said, it's not the first time they've done something like this. I guess it comes with the territory of insider builds.