@takashi9999 - Thank you very much. In this case, I recommend creating a list called "Tracking" and adding a record to it every time the user clicks on the image. We should be able to save both user details (Created By ) and timestamp (Created) information this way. Then, using "Tracking" list and filtering by image name / ID, you can observe how many people clicked on it throughout the use or on a date basis.
Create "Tracking List" with columns
Title column will be used to store the image name
Image ID will be used to store image ID (based on asset library / document library) (Optional)
Then use the below code in 'OnSelect' property of the image inside gallery
Patch('Tracking List',Defaults('Tracking List'),{Title: Title4.Text})
Between, how many users will use the system and what is the expected clicks on average for a month ?