There will be a FABRIC version of IC2?

Yes, you can find fabric builds on jekins https://jenkins.ic2.player.to/job/IC2/job/1.18/

Its porting to later versions was planned by the team, but it is no longer a top priority. I have no idea why they stopped updating the mod, but it is currently at a very awkward standstill. As you pointed out, there are many mods that are far superior to ic2, so you might as well accept that.