Thank you for this. Could you elaborate more on how you did the port forwarding? "Since my RouterOS box is behind another router, I forwarded this UDP port to it."I'm replying to you over WireGuard configured for this very situation.
Thank you. Worked like a charm!You don't do the port-forwarding on the RouterOS box; you do it on the ISP router. Even if you had named it, the how-to of setting up a port-forward on it from the public WG port you picked to the RouterOS box behind it answering the WG connection would be off-topic here. That's why my guide links you to this generic port-forwarding guide.