Eh, no. That's a reach. A company policy would be something that the whole company is expected to follow. If only the teams that coordinated on it follow it, that's not a policy in any way, it's just a choice that a portion of the company made, it could be something that the company doesn't care about one way or another or it could be something that wasn't addressed prior to release (if you think every decision a team makes gets complete review and is totally understood, I think you're wrong).
Do office apps open links in edge? Does VS code?
If they do, then I agree with you. If they don't, then I don't, for what should be obvious reasons.