Start by selecting the entire track & do a bounce to clip.
This will put everything into one long, contiguous clip which makes troubleshooting a bit easier.
Next, select all the notes by clicking & dragging down the notes pane on the left. Make sure all notes are on the same Midi channel, unless you're doing something a bit more elaborate with Midi assignments
How are your velocities? Sometimes, quiet notes can almost disappear visibly in the prv as their shade fades downwards with velocity.
None of this explains why you can't see it in the Event List though.