Yes, you're still running beta software (at this point in time 13.2 is a beta version).
You can remove the beta by following Apple's instructions here:
The easiest method there is to open
Settings > General, tap
Profiles & Device Management, tap
iOS Beta Software Profile and then tap
Remove Profile. Afterwards you need to reboot the phone.
Now the next time Apple releases a non-beta version of iOS, you'll be able to update to it from the normal Software Update.
If you want to remove the beta right away and install a non-beta version, you'll need to erase and restore the device. You'll want to ensure that you have an up to date backup before erasing, and then restoring from that after restoring the system.
The easiest way to do this is to connect your iPhone to your computer, and then put your iPhone in recovery mode (press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side button until you see the recovery mode screen). From iTunes (or Finder if you're on Catalina) choose to Restore the phone, which erases the device completely and installs an up to date, non-beta version of iOS.