I've never heard of this before. Nice to have other variations. https://www.redotengine.org/ I wonder why they forked Godot. Also they don't like to mention it at all it seems: https://docs.redotengine.org/en/stable/about/introduction only at the bottom as

© Copyright 2024-present by the Redot community, modified from an original work by Juan Linietsky, Ariel Manzur and the Godot community (CC BY 3.0).

If I were a game developer, I would probably stick to Godot unless there is a really good reason for relying on this fork. One has to trust them fully.