Your first picture appears to show a split near a seam?

I can't see anything in picture 2.

Picture 3 is normal engineered stone resin pooling.

Update; New pics provided below, which change things.

None of these are issues. The distance to judge any installation is standing 3’ back. You can’t evens see anything in the pics! The first is a normal seam with pencil marks.

Hopefully these are clearer

1 looks like something is broken. I don't know if it can be fixed but I'm sure nobody will argue it's okay.

2 should be touched up.

3 looks like someone rubbed it with a belt buckle. It's probably cleanable, like those marks you get on enameled sinks that you need Barkeeper's Friend to remove. (I do NOT know if that is safe on quartz.)

There is no fixing the split near the French miter on a new installation. If you'd done it, I'd suggest some decontamination and tinted super glue. I've never seen anything like the the second picture above and I've been in the engineered stone business since its inception.

Do-over, the lot of it.

I think it needs to be replaced. Those are 3 flaws. Best of luck❣️

What Joe said, and picture #2 it looks like something was there and it wasn't removed, or they tried to touch something up or hide it, and if that's the case they did a bad job.

Have them come out and look at everything and out of curiosity have them use a razor blade and scrape that build-up away and see what's under there (don't do yourself, let them do it).

Good luck

This shows the importance of putting in the clearer pictures first! Ask them what their plan is. They should be having the world’s best youch up guy visit, on approval. Or a reinstallation date.

Thanks all. It is a new build so it's under warranty. Supposedly pic 2 was just paint that was cleaned off. Agree with you Joe about the split.