Instagram does not provide a specific timestamp for when someone sends you a friend request. The platform only notifies you that you have received a friend request and displays the sender's username and profile picture.
Once you receive a friend request, you can choose to accept or decline it. If you accept the request, the person will become your follower, and you'll be connected on Instagram. However, if you decline the request, they won't be notified of your decision.
It's worth noting that Instagram is continually updating its features and user interface. So, it's possible that they might introduce new functionalities in the future that allow users to see the timestamp of friend requests.
For the most up-to-date information on Instagram's features, you can refer to the app's official help center or check for any recent updates in the app's settings or community forums.