what about this gas line?

This kitchen gas line was flexible and going into what appears to be a schedule 40 pipe. I have not seen this before. Home built in 07. Is this ok?

Is it used as a chase?

Looks like someone ran 1/2 inch CSST from the gas stub through PVC. Does it go to a BBQ or fire pit?

I don’t know if CSST is rated for any outdoor installations. I’d write it up because it is non- standard, and you don’t know how deep it is. Gas is usually required to be 24" deep.