Iris sourcecode is public... anyone can just compiled it so my friend Fjox did that.
SCREENSHOTS
Spoiler: Transcript for all images
Image 1: Title card linking to the Github here
Image 2: Feature Listings
1: Custom biome colors...
I only found a version of ItemsAdder from july 2023. But the plugin LoneLibs that Itemsadder requires, crashes on load every time. The developer for LoneLibs is trying to figure it out.