Question on Copper Tubing

Exterior copper tubing used to supply gas to the fireplace insert and the bbq grill. Shouldn’t the tubing be protected when going through the wall?

Personally, I’m not a huge fan of flexible tubing running through building materials.

Yes due to expansion and contraction of the building materials.

Needs urethane caulk there as well.

Most jurisdictions won’t allow copper, if it’s natural gas.

seems like this would be asked in plumbing

yes all piping should be sleeve protected with approved material when passing through masonry or concrete
approved sealant choice is personal preference

are you sure? some do, some may not, most is a stretch

codes allow specific type cu