Hi @Areolata im just made my MultiMC minectaft 1.18.1 manually work with forge.
you have to make a txt file and paste this to it.
</>
{
"minecraft": {
"version": "1.18.1",
"modLoaders": [
{
"id": "forge-39.0.75",
"primary": true
}
]
},
"manifestType": "minecraftModpack",
"manifestVersion": 1,
"name": "my forge minecraft",
}
</>
Ahen change it to .json file and compress to zip.
After creating a new instance with it everything should work.