I like the reinforcing tubes on the door.
If you’re handy, I look at adding another tube or angle iron along the latch side, and making sure the chains are welded/bolted solidly through the tube.
Good ideas.
Also... that door is really heavy. It’s made of some pretty thick sheet metal welded to angle iron. That green pole holding it open is spring loaded at the bottom, or one person wouldn’t ever get it open by themselves.