Fast Pathfinding for many agents?

I’m currently using Unity built-in navigation with 2000 agents and I get about 7-8ms CPU cost with Local avoidance being the cuplrit.
I’m thinking about using this asset will this asset improve my performance? My levels are simple very rare changes like 0-2 changes per level (destroyed wall). No jumping, practically my game needs 2D pathfinding (game is 3d but characters are always constrained to the terain plane).