Aternos provides a mod called LotRCircles through the Technic Launcher, though this mod isn't as good and useful as the normal Lord of the Rings mod through Forge. Would it be possible to get the Lord of the Rings mod under the Forge mods tab?
The Technic mod includes not only the lotrcircles mod, but also like 150 other mods, which makes servers run really slow and laggy, so another LotRmod would be better. Another Technic LotRmod would also be good, as long as it is just the LotRmod and no other mods.
Pixelmon also has 2 modpacks under the Technic tab, so I think LotRmod should have a better pack aswell.