I need help configuring the A* Pathfinding Project to suit my level. Is it even possible?

And here’s another piece.

As for the third option and what I’ve managed to achieve at this point. If you’re interested and have the time, you might want to check it out in the adjacent thread. Foolishly, I created a duplicate, and now the information is a bit scattered. In the last comment, I attach a rather long video and describe the problems that exist at the moment. Plus, there’s an example script there. With some research and my own modest efforts, I was able to adapt it for my case. It’s a pity that the situation is still far from ideal.
https://forum.arongranberg.com/t/seeking-help-with-navmesh-and-a-pathfinding-issues/15910/3?u=vitaliy.jafarov