No compatible versions for older MC instances

There’s a couple of good modpacks around MC 1.12 that I’d loved to be able to play with CC enabled but from what I can tell CC only works with the latest iteration of modded MC which is usually where the least amount of modpacks are available. Would it be possible to create a version that can be used for lower MC/Forge versions?

Minecraft CC works with 1.15.2 and the latest version. We are not able to support any lower versions at this time. We understand that other packs could be fun to use with CC and we’d love to be able to support more versions but are unable to dedicate the resources to doing so at this time.