Is there a way to see a heatmap on Google Analytics?

A heat map allows you to see how much time is spent in different sections of a certain web page.

This isn't super possible within GA4. Your best bet would be installing either HotFrog or MouseFlow onto the site. They both have free versions, so I think either one would be a good choice! Essentially they can create heatmaps and record little videos of a user's session on your site.