Local server can't be seen on Android or iOS, but can on any Linux device

192.168.x.x:1500

So I have a small local server running a website. It's not public facing at all, has a static IP address on my WiFi LAN and can be accessed by any Linux machine. I can't see it on any iPhone or Android device though

I've looked up tutorials on line, ensured my firewalls allow local sharing on the WiFi, double checked I can even ping the server successfully with nmap on Android

Any tips?

::edit:: typo in post, not when searching for IP on LAN