How can I see the Raw photo of my imported Raw and JPEG pairs?

Photos is stacking the RAW &JPEG pairs as one photo. It is using the JPEG as the original file by default, but you can change this in the Image menu and switch to the RAW file as the original, see: Photos for Mac: Importing Raw and JPEG pairs, Catalina Version

I posted the wrong link, see: Changes to the handling of RAW&JPEG pairs - Apple Community

. In Photos 5 we can now simply select the thumbnails of all RAW&JPEG pairs at once and use the command "Image > Use RAW as original" and be done with it.

But there seems still to be a bug. If we managed to import a RAW file in a format, that is not supported in macOS 10.15, and include this RAW&JPEG pair in the selection for "Use RAW as Original",

Is your camera on the list of supported cameras? See: Digital camera RAW formats supported by iOS 13, iPadOS 13 and macOS Catalina – Apple Support

You cannot switch to the RAW as original, if the format is not supported for your camera.

And do not try to batch change to the RaW files as masters. Photos may crash.