How to troubleshoot gas supply not making it to some appliances
It sounds like the gas system was never purged after a nitrogen test. The appliances in question are probably farther down the line and still have non-combustables in them. It will take a very long time to purge through a pilot tube. You need to close the gas line valve on one of the appliances, remove the drip leg, open the valve to vent non-combustables and close it when the sound changes or you smell gas. Replace the drip leg, open the valve and start the appliance.

Do not do this alone. Someone needs to be with you in case you pass out, have a stroke, faint etc. It's very unlikely but if you are rendered incapable of closing the valve a second person can. This is important. Explosions happen because of this.