Google Drive – How to Undo View Google Photos

Yes, Google Photos can access photos saved in Google Drive. The Google Drive search view in Google Photos displays photos by date, not by the Google Drive folder structure.

From How Google Drive works with Google Photos - Photos Help

View your Google Drive photos & videos in Google Photos

In Google Photos, you can do things like create collages and GIFs, edit your photos, make movies, and share with people you care about.

You'll see your Google Drive photos and videos in the "Photos" section of the Google Photos app, but you can also see just your Google Drive photos & videos using the Google Photos app.

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Computer

1. Go to photos.google.com/search.
2. At the bottom right, click Google Drive.

SEE MY DRIVE PHOTOS

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Note: If you edit a photo in Google Photos, those edits don't show in the Drive version of the photo. To have the edited photo appear in your Drive folder, download the edited photo in Google Photos and upload it to your Drive folder.

While on Google Photos click Upload, (probably upper right corner), then click "Google Drive". If for some reason that didn't work, just read this short official Google help made to answer this exact question, it will tell you what's wrong.

If after clicking upload "google drive" doesn't show up, It's probably because your account is work/school. One workaround is to share the photos to a non-educational account, and follow the method given at the beginning of this answer.