Make a creator account to see metrics like how many people saved your post.
Unfortunately, Instagram doesn’t provide this information.
Here are some ideas:
Take a screenshotof the post and thenpost a storyusing that screenshot.

Add some text to let your followers know what you’re asking about.
Either ask about the post or screenshot it, then giveYesandNoas the options and wait for the results.
Use the questions sticker.

This sets up a template for asking the question.
But it doesn’t work from a personal account.
Choose thepostyou want to view the save count for.
Several stats appear; the bookmark icon refers to how many times someone has saved this particular post.
The reason for this limitation is likely privacy.
FAQ
Toview posts youve previously liked, tap yourprofileicon in the app.
Go tomenu(three lines) >Your activity>Likes.
it’s possible for you to view the last 300 posts youve liked.
Toview your archived Instagram posts, tap yourprofile>menuicon (three lines) >Archive.
Torepost an Instagram story, tap thepaper airplanebelow the post, then selectAdd to story.
For this to work, the other account must be public with post sharing or story sharing turned on.