Hi! Thank you very much for supporting my work! <3
I'm not sure how the collider generation works in Unreal Engine, because I'm not familiar with it, but in Unity you can easily generate a primitive or a convex collider for the mesh.
The majority of the models are primitive shapes, like a cuboid and a cylinder. There has to be a way in Unreal Engine to add a primitive collider to such shapes easily.
Are you experienced in Unreal Engine?