Raw photos from Olympus TG6 will not transfer to Photos on my Mac. I use this camera for snorkeling mostly and it’s great! Any help would be appreciated. It recognizes the pics but when I try to Import all, it’s just a blank square with RAW in left

The issue here is that raw support for each model of camera - and that's model, not brand - has to be added. So this camera is not on the supported list here

Digital camera RAW formats supported by iOS 16, iPadOS 16, and macOS Ventura - Apple Support

and therefore Photos cannot work with these images.

Options: try convert them to DNG with Adobe's free converter

Use another 3rd party app to manage and process your images. Many 3rd party apps write their own raw decoders, and are subsequently a lot faster than Apple at the job.

My Mac Book Pro 2021 won't even recognize my Olympus T6 camera. The device doesn't even show up on my camera. Yes, I followed the camera manual instructions. Suggestions? I don't know what is meant by downloading a 3rd party app, btw.

The device doesn't even show up on my camera.

I would not expect the computer to show up in your camera. Have you tried using a USB card reader?

I don't know what is meant by downloading a 3rd party app,

It means buying and using an app by some other developer than Apple - there are plenty, and many that specialise in Photo software, unlike Apple for whom is very much a side line these days. Adobe, for instance, On1, or DxO...

You could try the software provided by Olympus to convert the RAW files to another lossless format, for example TIFF, the OM Workspace: https://download.omsystem.com/pages/owdownload/en/

I expect that the manufacturer of a camera will provide the best RAW developement.