You can see how many times your Instagram post has been shared, but Instagram does not reveal exactly who shared it due to privacy reasons. Here are the key ways to see sharing info:

• If you have a Business or Creator account, go to your profile, tap the post, then tap "View Insights." Look for the paper airplane icon, which shows the number of shares via direct messages or story shares. However, it does not show who specifically shared it.
• If someone shares your post to their story and tags you, you will receive a notification with their username. This is the closest way to see who shared your post publicly.
• For story reshares on public accounts, you might see them in "View Story Reshares" on your post, but only if the story is still live (within 24 hours) and the user tagged you or is public.
• Personal accounts do not have access to these insights.

In short, you can see share counts and some story reshares if tagged, but you cannot get a complete list of who shared your post directly.