Steps to reproduce:
Export a ProRes 422 MOV file from Premiere Pro 2020 that is 1920x1080 @ 29.97 fps, Upper Field First, square pixels.
Ensure Toast Video Prefs set to NTSC.
Set Toast 19 Pro to burn a Blu-ray Disc image.
Import the ProRes MOV file from Pr.
In either Updated or Classic mode, prepare menus and encoder settings for burning a Blu-ray in Toast.
In either Updated or Classic mode, burn the BD image.
The video in the disc image is PAL 25 fps, not NTSC 29.97 fps.