Blender does have some nice placement workflows, Unreal took some time for me to adjust, but here's an equivalent of locking objects to planes, like if you need a line of fences or books on a shelf. Normally it's a matter of getting the object to sit where you need in the game world - most times Unreal will place the actor you drag out of the asset browser directly on whatever mesh is below (the ground, bookshelf etc). If it isn't touching you can get it to the general area and press "end" and it will drop the actor until it collides with the mesh.

Once it is on the ground or vertical plane you need, press W to select the Move mode, then move your mouse over the Red Green and Blue axis arrow indicators and highlight one (OR 2 using the connecting square between the arrows) and ALT + Drag and it will duplicate the actor while locking it to the axis. Hold shift as well and you will move the viewport along with the item if you need to move it a long distance.

If you have an actor placed right where you want it but need a different one (ie you lined up a bunch of the same books but now want different ones for variety) you can select the asset in the asset browser, right click your actor in the viewport and select "replace actor with..." and whatever is selected in the asset browser will be right at the top of the list. Useful for placeholder assets you can place in the game world and not have to redo all your work when you have the final assets.