It comes down to entropy and cost of labour. It takes more work to undo entropy turning a complex material mix which is either an appliance still intact or crushed and mixed even more back into its raw materials.

Processing mineral ores into raw materials is cheaper.

So the only way is to regulate market, meaning forcing companies to put in the extra work.

Currently these regulations tend to be circumvented by illegally exporting e-waste into countries with cheap labour, no such regulations or corruption (usually all at the same time).