How to make a mesh for an imported object

So I’ve made several objects in Blender, and I have tried to make them walkable, but no matter what I try I still fall through them. Many people have said to use mesh collider and rigibody components, but I do not have a mesh for the objects from blender, how do I turn the imported objects from blender into meshes so I can use it for the Mesh Collider component?

Never mind, all I have to do is set “generate colliders” to true before I turn my imported Blend into a prefab, and then it will create perfect colliders for the object.