unity – why isn’t my tilemap collider appearing?

I am trying to make a 2d game but my player falls through the tilemap every time.

my tilemap collider doesn’t seem to show up.

what is going on? and how do I fix this?

the first image is rigidbody currently falling through the tilemap and the tilemap. the second image is rigidbody currently falling through the tilemap and the rigidbody
rigidbody currently falling through the tilemap and the tilemap

rigidbody currently falling through the tilemap and the rigidbody