It's an imperfection--minor honeycombing that ideally should be filled and covered with non-shrink grout if you're really concerned.

@worthy, any particular product would you recommend? I have something like that on shed slab.

Would this be caught in an inspection? It’s in about 5 or 6 different spots so I just want to make sure the foundation is solid.

Would this be caught in an inspection?

Totally depends on the jurisdiction. Where we've built as licensed builders, inspectors carefully inspect the soil under the footings before the pour. After that, the next inspection is for framing.

If this is a custom build, I can't imagine the former objecting to a 15-20 minute touch-up.

Particular products

Brands?

None. To be sure you're getting the right material, try a building supply store rather than a Big Box.

Great, thanks a lot!

No concern.