Yes, it is possible to delete photos from your recents but keep them in an album. When you delete a photo from your recents, it only removes it from the recently added photos section. The photo will still be available in any albums that it was added to.
To delete a photo from your recents, go to your Photos app and navigate to the "Recents" album. Select the photo you want to delete and tap the trash can icon. Confirm that you want to delete the photo, and it will be removed from the recents section.
To make sure the photo stays in an album, navigate to the album where the photo is located and make sure it is still there. If it is not, you can add it back by selecting the album and tapping the "+" icon, then choosing the photo you want to add.