I would offer a slightly different take here. I used to work for a very well-known company and we collaborated with a popular celebrity on a highly anticipated product. Said celebrity decided to make a social media post about said product prior to the official announcement. This was absolutely not OK, and a lot of people from different departments were involved in damage control.
Now it's entirely possible that Universal genuinely doesn't care or this was entirely planned. However, based on my personal experience dealing with leaks, I do not see that as being the case. I would suggest that if was indeed a leak (and it is a leak, just not the way we would typically think of leaks), then Universal is probably scrambling a bit to figure out how to address it. In the same way IP owners are unhappy about leaks because they tarnish the brand somewhat, an unplanned celebrity leaking something ahead of official word hurts a company's ability to control any narrative or consumer expectations. Look, we're superfans here. We know The Weeknd is coming and have known that. However, your average The Weeknd fan doesn't. They may not even know HHN is a thing. There's probably only a small overlap between HHN fans and The Weeknd fans. We have reason to believe that announcements will be later this year because of various reasons, so this could very well be messing up Universal's timing. They don't want hype to peak too early, and this could be creating an issue in their minds. If marketing isn't ready or call centers don't have memos with answers, Universal has to quickly do a bunch of things to deal with the fallout, and that's just not something we are privy to from the outside. This also was likely spelled out in a contract with his lawyers, publicists, and marketing, which means there are legal issues surrounding it as well.
Will Universal do anything? As Legacy said, no. The Weeknd owns the brand and he's not going to pull it. However, I would suspect it's very unlikely Universal is happy about this if they didn't know about it in advance. While these kind of unplanned things can build hype and may even work out, they do have consequences internally and we can't automatically assume Universal is happy about it.