While navmesh is a pretty cool tool provided by Unity, it's restricted to 3D games, and there's no equivalent for 2D games out of the box, so I implemented my own tool for creating navigation shapes.
Here are a few resources I used to make this:
Sebastian Lague's polygon shape editor tool
• Unity Shape Editor Tool (1/4)
David Gouveia's awesome post on polygon pathfinding
https://www.david-gouveia.com/pathfin...
Bedroom Picture (actually google sketchup stuff)
https://www.potsly.com/2019/10/186-ap...