Well it seems uneven. The materials in electronics are so varied that there seem to be different levels of recycling, hopefully with materials pricing going up the worst forms of recycling can go away.

China sells a machine for anything you can imagine: Here is a wire grinding machine to recover the copper from wires: https://www.youtube.com/shorts/p_hmDdGIk7g

PCBs first seem to be cut up before put into similar machines machine above: https://www.youtube.com/shorts/WO-VvucMq4E

https://www.youtube.com/shorts/q_O1EpEcKaM

Dont know what happens to the ground epoxy resin, maybe mixed with other materials?