Extension Warehouse in Sketchup for Schools?

[spawn]

As far as I know, it’s not possible and I wouldn’t count on it (not sure if the English expression is right).
I quote a post by @eneroth3 on August 2017.

Why not just use my.sketchup.com?

If I were in school I’d any day prefer Make since it support extensions. SketchUp without extensions is a bit like a smartphone without apps.