Tilemap collisions can normally be checked without any behaviors.
When testing for collisions with a Tilemap object, empty (erased) tiles count as not colliding, and all other tiles count as colliding. A custom collision polygon can be set for individual tiles by double-clicking a tile in the Tilemap bar. Note however the collision polygon cannot be entirely removed from a tile: only an erased tile counts as not colliding at all.
Perhaps you want to add the solid behavior to the tilemap? It will then have special interactions with a variety of behaviors.
If you want it to interact with the physics behavior, give it the physics behavior and enable the immovable option.