WAN out connection Issues

[Tetra]

I've ran into an issue setting up my personal physical network. I currently can't ping my ISP Router from my endpoint but I can ping the Opnsense WAN from the same endpoint. I believe it might be a routing issue between the WAN and ISP but I'm hopping someone could provide more input. The following is my topology for clarity:

Endpoint --> SVI --> Switch Routed interface --> Opnsense LAN --> Opnsense WAN --X--> ISP Router --> Modem

[viragomann]

Is the OPNsense WAN IP private or public?
Is the ISP routers IP private?
Can you ping the ISP router from OPNsense?

[Tetra]

The WAN IP is private and the IP on the ISP is private that I am trying to ping. I have also tried to ping the ISP's public IP but as expected no luck. I have tried to ping the ISP router from OPNsense with no luck.

[viragomann]

Does the ISP router even allow any access?
What if you connect a computer to it directly?

Do you have internet access through the router?