Someone could probably just download the instructions. Would be much easier. Point was that every Linksys I have ever owned has had port forwarding. Not defending them, just saying.

Linksys’ stock firmware is trash. No port-forwarding or really any of the features you’d expect from a 300CAD router.

Maybe you didn’t look hard enough. I have a WRT1200AC, and under Security -> Apps and Gaming is Single Port Forwarding, Port Range Forwarding, and Port Range Triggering.