Ive found getting two heltecs works out to tell if the system is working or not. Then putting one very high (like on a chimney) and using that one was as the one the city connects with.
Lora is VERY much a line of sight kind of system. If anything gets its its way, it will stop sending. Its very fickle.
You may want to reach out to your local ham group (if you have one) and see if anyone is interested in metastatic. We had one person that was super into meshtastic put a node on a foothill nearby and it covers the entire city. It gets awesome coverage. But thats the only reason I can talk with others and its spotty sometimes.