R6 Metarigging in Blender

I want to make a R6 Metarig that some people use in blender but I have no idea how.

I’m losing my marbles working with IK R6 Rigs and the worst one, default R6 rigs, there’s this meta rig looking rig that I haven’t been able to achieve and I’m wondering if anyone knows how to use Blender and generate a meta rig for a R6 character