Instagram Mute Block is not an option that we can use for everyone. Anyways, if you accidently followed someone and quickly unfollowed them a few seconds later, they won't be able to know about it if and only if they're not online i.e.

When I block someone on Instagram, do their likes and comments disappear from my photos and videos?
Stop seeing someone in your Instagram feed You can sort of stop seeing someone in your Instagram … You can’t really make someone unfollow you, but you can block them from seeing your feed which is the next best thing. After you block someone, their likes and comments will be removed from your photos and videos. It doesn’t help that you can easily find out when someone unfollows you using apps . For example, if they notice that their number of As it will quickly pop up a follow notification and then can see who followed them.
You should unfollow someone when you don’t like what they post on Facebook. What Happens When You Unfollow Someone When you unfollow someone on Instagram, their posts will stop appearing on your feed. using Instagram at that moment. If you choose to unfollow someone on Instagram they will not receive a notification saying that you have done this. Should you block, unfollow or mute someone? However this doesn’t mean that they can’t work it out another way. People use social media to send a message. If you’re trying to figure out how to make someone unfollow you on Instagram, you’re slightly out of luck. If you have an existing account or the person you want to block was fine at first, you will need to try one of the following. Unblocking someone won't restore their previous likes and comments. What Instagram Does and Does Not Tell You About Follows Today, you would have to travel far and wide to find someone who has not heard of Instagram..

Do People Know When You Unfollow or Block Them On Instagram?