Collisions not working when using tilemap

Godot Version

Godot 4.7

Question

I am very new to game development and have uploaded temporary images to act as walls; however collision is not working. I have added physics to it but my sprite just walks right though the images on the scene. I have done static images and the character does bounce into those, but with a tilemap it does not seem to work. Any tips?

Have followed the official guide?