According to these leaks they seem to be developing something similar to Apples M series chipset shared lpddr-5 ram, shared across iGPU and CPU (I think?).

Looks like a maximum of 32gb though. And probably not as fast as the high end macs. But still promising that other, notably cheaper manufacturers are trying to copy this design.

https://www.techpowerup.com/315941/intel-lunar-lake-mx-soc-with-on-package-lpddr5x-memory-detailed