Out-of-the-box Gravity Forms does not support displaying or editing entries from the frontend.
But there is still a way to accomplish this provided you have one of the following add-ons.
#1 Gravity Wiz – Entry Blocks
This add-on offers a simple block-based solution for displaying and editing entries from the frontend.
#2 GravityKit – GravityView
This add-on offers more extensive features and functionality for displaying and editing your post on the frontent, and much, much more.