You can't see the mod in the in-game mod library on 2.1.
Any documentation?

I am running a locked 2.0.77 game of Pyanodons. I build this mod for that. However, I'll work on the 2.1 port, but I may not scrutinize this as much but at least test the basics and post it. if you could give me feedback I would appreciate it.

I released an untested 2.1 build. I have not built a 2.1 version, i need someone's save, so if you have issues and want to add this mod, give me your save and I will test it and make updates. This is not ideal, but my only saves right now need Pyanodons mods which are not 2.1 compatible.

Changing factorio version in sources to 2.1 did the trick and I was able to install and test it, seems to be working fine.

Awesome! This is what I would call "super beta" because I have not tested it at all I just ensured the base code ported without conflict. please reply with any questions and if you could DM me a save file link if you have issues so I can test.

So far I'm loving it. It doesn't seem to have any issues at all. I'm not really playing yet - I'm just experimenting with some ideas in the Blueprint Designer across different mods.
There's only one thing I'm missing: multi-surface support. Is that something you plan to add someday? I completed my last Space Exploration playthrough using vanilla 2.0 trains, so it's not a dealbreaker, but it would definitely be a nice feature to have.

I have never actually played space Age yet so I don’t know much about what I need to do for multi surface support. Can you describe to me what it is that you need for multi surface? Does that mean that a train can go between two planets or does it mean that the RLD manager can see different things on different surfaces from one interface?

I was talking about the Space Exploration mod. It has a Space Elevator that allows trains to travel between surfaces (for example, from a planet or moon to its orbit). You might want to check out this mod: Integrates LTN with Space Exploration (https://mods.factorio.com/mod/ltn-space-exploration).

I’ve started working on this but it is a large coding lift. I may include it as a separate mod or include it, not sure yet.