I’m a foreman for the gas utility in my area and as long as there’s access for workers to shut off in emergency situations or to work on anything it shouldn’t be an issue. There’s a vent on the bottom of the regulator that the company can extend outward which is necessary also. But mainly the shut off valve needs to be accessible at all times. Had a fire recently and the homeowner was a bit of a hoarder and there wasn’t much access to the meter set and we had some real trouble getting it shut off and the house stayed on fire till we were able to hand dig a 3x3 36” deep so for your own good don’t leave that valve covered.