@bananaoverninja
What kind of service are you trying to open the port for? Please share with us some screenshots under Advanced -> Port Forwarding/Virtual Servers page.
You may refer to the below setup video to check the settings on the A7 again:
https://youtu.be/2tIUts0fyFk
If still failed, check this to confirm more details, show us the WAN IP address on the A7 status page:
https://www.tp-link.com/support/faq/785/