I was testing the most recent commit on a 1.16.5 singleplayer world and noticed that nether portals in the mirror world don't light. Would it be possible to make portals in the mirror world link to the normal nether, or even possibly to a mirror nether?

Also, I noticed that there aren't any 1.16.5 versions of the pack on curseforge. Do you know when you will be able to upload a version to curseforge? I would love to use this mod in a pack!

Hello, the portals do not light as there is a hard check for the overworld and the nether dimension in minecrafts portal handling.
The main problem is when you can create nether portals you can go to the nether, but when you go back it does not know the dimension you want to go to. On top of that there is the problem with movement scale factor between dimensions. It is always based relative to the overworld dimension. I'm unsure if there is a way to implement that in a usable way.

I'll publish a build soon, have just worked on porting that mod a few days ago.