How to change a Mesh's Render order relative to the entire scene?

Godot Version

4.2.1

Question

I’m trying to recreate the old school method of skyboxes where a sphere is “glued” to the player’s head and moves with the player, but it’s rendered before anything else in the scene, this way creates a skybox with a high definition with not necessarily high res textures or poly count, but I can’t figure out how. Any techniques you might know?
Here’s an image on how it looks from the outside, the inside should look just like a skybox.

Look into viewports