I'm a little late to this, but since you asked for what the CoMaps community thinks, I'm going to answer this question from two viewpoints: as an occasional contributor to the project, and as an end-user. (The contributor statement is not an official statement from the project; it is solely my opinion.)

As a contributor, not really much to say here. We sometimes chat about these vibe-coded alternatives in Zulip, and to me it's just another vibecoded app.

As a user? They're most definitely violating Google's copyright by using their (likely copyrighted) data, unlike e.g. NewPipe which is using YouTube videos that Google does not own the copyright to. I'll leave it to Alphabet to decide whether to sue (or not sue) Vela's devs. But personally, as a user, I'd be wary of an app like this. Besides the copyright grey-area, the whole point of switching to a FOSS app is to de-Big Tech, not remain tethered to Google. Plus, because it's vibecoded, I'd just ignore it anyway.