Social platforms often process every image after you upload it. They may resize it for a feed, create several derivatives for different screens or convert it to another format. That processing can remove some metadata, keep some fields or add new information of its own. The exact result depends on the platform, the file type and the way the image is uploaded.
Why relying on the platform is a weak workflow
You usually cannot see which fields were removed, and an app update can change the result without warning. A file that looked clean after one upload may be treated differently in another part of the service. Even when technical metadata is stripped, the platform can still attach a caption, location, account information or a label after the upload.
Prepare the copy before you post
Keep your original in your own library. Add a copy to whyaiai and let it show the common markers it finds. Then download the clean export and use that copy for the post. Clean an image before sharing so you know which file you chose, rather than hoping the destination will make the decision for you.
Keep the visible content in mind
Metadata cleaning does not blur a house number, remove a notification from a screenshot or erase a visible watermark. Crop or edit those parts separately when they reveal something you do not want to publish. The purpose of a clean export is narrower: reduce the information stored alongside the pixels.
A simple repeatable routine
Inspect the original when the image is sensitive, clean a copy, check the export and upload that copy. Keep the original offline or in your private library. This takes less time than trying to work out what a platform did after the fact, and it keeps the choice in your hands.