Has ping / tracert been blocked on 5g network?

This has been a problem for me off and on since its inception and through multiple TMHI gateways.  IPV4 ICMP pings just randomly fail sometimes for days.  Or latency just varies dramatically.  Rebooting the gateway works sometimes and other times not so much.  Not sure what is causing this exactly BUT IPV6 seems to work every time.  So it could be related to their CGNAT implementation or a combination of that and the gateway firmware.  I use a dual WAN OPNSense setup and need to monitor WAN quality to pick the best ISP.  Right now I have just disabled monitoring on that interface to get by but I may have to try to get IPV6 working on WAN interface to fix this permanently.  But that's a big bunch of complexity that I really don't want to undertake.  I don't have any wired ISP's in my area so I am stuck with TMO and ATT until Verizon offers their wireless internet in my area.   If anyone comes up with a solution please let us know here.  Gracias.