I work at an MSP and while it wasn’t LastPass, when you search “Microsoft Authenticator” in the app store there’s a similar looking Authenticator app that’s also blue, and because it’s an ad it shows up first. Had a user install that and was confused why they weren’t able to get MFA working.
Ads in these app stores are a fucking cancer. If the search query is an exact match with the app name, the sensible thing to do is make that app always come first. I guess that won't pay the bills though.
I recently ran through an MFA enforcement campaign and had to build that app into my instructions. "Make sure it's the Microsoft authenticator, not the first result in the paid ad slot" because so many people were installing that app. I do deal with pretty low levels of tech savvy, but still.