Yes. As soon as you unblock them, your profile becomes public to them (assuming your account isn't set to Private). If your account is Private, they will need to send you a follow request to see your content.
But time passes, tempers cool, and curiosity (or reconciliation) sets in. Now, you want to reverse that decision. instagram unblock user
If you search for a user and they don't appear, it is possible they have changed their username, deleted their account, or Instagram has banned their account. Try checking the "Blocked Accounts" list in your settings to see if they are still listed there. deleted their account