I use ProtonVPN while torrenting, with port forwarding enabled, which requires that i manually copy the port provided by proton into tixati every time it connects. Over time, this has gotten annoying. Is there any way for tixati to automatically grab that port number and save me the couple seconds every day?

Their manual says that at least a Linux client saves the port number to a file, so you could try to automate it with some scripts. However, Tixati doesn't seem to have any API to access its settings, apart from web interface, which does not have them all. So your only hope is AutoIT-like GUI automation, which can work, but is vey brittle, and probably takes the same amount of time when you include all the delays and window visibility checks.

If you need a reliable solution that does not require GUI interaction, you probably want to bind Tixati to a virtual/container interface, then route and NAT its traffic to the currently reported port on VPN interface, and to monitor the system popups to extract the number from the VPN client message. Certainly doable... if you have some experience with networking.