How can I separate raw and JPEG images in my Photo albums?

If these photos were taken/imported into Photos as RAW+JPEG pairs, they stay that way while inside the Photos environment. The classic way to separate them on a Mac is to export the pair to the Finder, delete the pair from Photos completely, then re-import whichever one(s) you want separately (usually just the JPEG).

If you are instead asking to be able to sort those photos which have RAW components from those that only JPEG, you can do that on a Mac with a Smart Album using criterion ("Photo", "is", "RAW"), but only Macs can make that distinction, and it cannot split a RAW+JPEG pair.