NeoForge support has been added into Architectury Loom 1.2+.
See the NeoForge migration guide for using NeoForge with Minecraft 1.20.2+.
1. Replace the forge code in the build.gradle dependencies block:
forge "net.neoforged:forge:VERSION"
2. Add the NeoForge repository in the build.gradle repositories block and settings.gradle repositories block:
maven { url "https://maven.neoforged.net/releases/" }