Export frame from each clip with existing marker's title as subtitble

I'm editting a video clip from a huge set of recordings,

1. I've sorted them all first into separate sequences based on the place,

2. Then I'm reviewing each sequence and cutting out potentially usefull clips & moving them one track up
3. Every time there is a lipsync going on within said clips, I add a marker with the exact text that is being performed
4. After I'm done with markering I wish to export first frame (& last) from each clip so that I can put them all on a miro board to improve my awerness of each clip (easier to work with than a 1-dementional sequence inside PP). I know how to do this thanks to that post.

the only thing idk how to perform in batch is how to add a subtitle to these frames based on the marker's title, it would be awesome to have it on those exported frames, so that I can group shots with the same text lipsynced and order them based on the placement in the song