You can see your comments in the Comment panel, which can be opened by clicking on the Comment button in the top right corner of the file viewer.
If you don't see your comment in the Comment panel, it may have been resolved and moved to the "resolved comments" section at the bottom of the list of comments.
To view resolved comments, click anywhere on the resolved comments card. Read about reopening a resolved comment.
Please note that the Report an issue button located in the top right corner of the Gallery home page is not intended for commenting. Please use Report an issue for reporting bugs, making feature requests, and providing other feedback to the Gallery team.