A micro-mod which simply alters the tree draw layer so items/chunks/pawns are not drawn in front of it. It should work with most tree-adding mods.

The vanilla draw order is a gameplay > aesthetic design, ensuring that the player will normally be able to spot items/chunks/pawns even in densely wooded areas.

There isn't a perfect solution to draw order due to Rimworld's limited graphical scope. For example, very tall buildings (like the radio tower from Fortifications) will draw behind trees even if placed in front.

Ultimately, it's a trade off on which draw order will look better based on your playstyle and mod loadout.