As for the physical connection, fips, yggdrasil, cjdns etc. are medium agnostic so you can use anything. wired Ethernet or WiFi direct between your neighbors? Sure. A lorawan peering? Np. Long distance laser or actual fiber from legacy ISPs and peering from an IX? Also good.

The hardest part is getting people onboard to peer with you, both inside and outside the jurisdiction, who are willing to bust the sanctions.