To see who shared your Instagram post, you need to have a professional account (either a business or creator account). Personal accounts do not have access to this feature. Here are the steps:

1. Switch to a professional account if you haven't already:
   • Go to Instagram settings.
   • Tap "Account."
   • Select "Switch to Professional Account" and choose either business or creator.
2. Once you have a professional account, open your Instagram profile and tap on the post you want to check.
3. Tap "View Insights" on that post.
4. In the insights, you will see various metrics including the number of shares (indicated by a paper airplane icon).
5. If available, you can see details about who shared your post, especially if they shared it publicly or via stories.

Note that you can only see shares within a limited time frame (usually within 24 hours) and only for publicly visible shares or story shares that tag you

. If you do not see the "View Insights" option, it means you are likely using a personal account and need to switch to a professional one first

. In summary, Instagram does not provide a direct way for personal accounts to see exactly who shared their posts, but professional accounts can access share insights through Instagram's analytics tools.