Like the other commenter said you should only forward 1 port. Open a port forward for the port number specified in your torrent client's settings for Incoming Connections.

Also keep in mind some ISPs may not allow you to forward lower port numbers, you should aim for any port in the Ephemeral port range (49152-65535) see https://en.wikipedia.org/wiki/Ephemeral_port

When you configure your router make sure you are forwarding both TCP and UDP. And when you're doing it create a regular port forward, not something like port triggering which is something else.

Test your port forward with any port test website to confirm it is working e.g. with the torrent client running browse to https://www.canyouseeme.org/ or similar & make sure the test is successful using the port number you forwarded.

If none of the above works then you have something else blocking the port e.g. firewall or anti-virus/malware. Or there's missing information you forgot to share e.g. maybe you're using a proxy or VPN, maybe you're using a ISP using carrier grade NAT (CGNAT) that cannot do port forwarding (https://en.wikipedia.org/wiki/Carrier-grade_NAT), maybe something else.

EDIT: One other idea, enable your log in qBittorrent (click View / Log and make sure to enable all the checkboxes) this should add a "Execution Log" tab in your main qBittorrent window. Now quit qBittorrent, wait until the qBittorrent process is shut down, then start qBittorrent and review the log as it starts up. Maybe you'll see new information in there you haven't noticed before.