This happened to me once. I was calling Amazon and did a Google search on mobile. I called the big number that was at the top of search results. After I had given my account email, but nothing critical, I started becoming wary of the questions I was asked because they weren't relevant. I hung up and searched again and the result did not come up again, and Amazon's number was totally different. I looked up the number I called and it didn't find any results. So I'm guessing an ad scam. I definitely don't trust Google results with featured answers for things like that anymore.

This happened to my father while I was around during the beginning of the COVID lock down. He searched for an Apple support number and was served a targeted ad for a phishing site. Because of the change in search a few years prior, ads now look very much like search results compared to the obvious visual distinction back in the Don't-Be-Evil days. The ad was sufficiently targeted that it only showed up on his device for the search -- nobody else would see it.

Ephemeral ads are not a good thing.