SSL works locally but shows “Not Secure” and redirects to router login when accessed from another network

[NaveenMaheshwari80]

I run this in my local environment and made the port public using router port forwarding. I bound a domain to my router’s public IP and mapped it to my local port with npm, then applied Let’s Encrypt SSL. It works fine locally, but from other networks it’s not secure and redirects to my router login page.