I can ping from the router (192.168.12.1/zerotier 192.168.16.1) to the member (192.168.16.2)
I can ping from another zt member (an iphone connected to zt) to the member (192.168.16.2)
I can ping from a computer in the lan (192.168.12.107) to the router's zt ip (192.168.16.1)
I can NOT ping from a computer in the lan (192.168.12.107) to the member (192.168.16.2) <-- this is what I want to be able to do

I am not knowledgeable enough to know how to properly add routes. Happy to post stuff but not sure what. Thank you