Path Exploration reports in Google Analytics 4 tells us about the actions a user has performed on the website laid out in a Sankey chart.
To create a path exploration report,
Go to Explore >> Path Exploration
Here's an example showing how a path exploration in Google Analytics 4 looks like:

On the other hand, a user exploration report in Google Analytics 4 gives us a deep dive into a single user's journey on the website.
To create a user exploration report,
Go to Explore >> User Exploration
Here's an example showing journey of a single user in user exploration in Google Analytics 4 looks like:
