Brand new build. Shim? Whats happening here?

Any ideas about what might be going on here? Shim? Any concerns? This is a brand new build.

What do you think?

At least they used good shim material. OSB has a high compression resistance unless it gets wet.

It certainly couldn’t get wet in a location like that!

Probably just there for the install and wasn’t removed. Keeps the wood trim off the concrete so it doesn’t stay wet and rot.