Usually the websites and apps you use, but not what specific page you visit and it’s content.
If you for example visit https://en.wikipedia.org/wiki/Labor_unions_in_the_United_States they could see that you visited https://en.wikipedia.org/ but nothing more.
This is assuming that the website is encrypted (it starts with https://, not http://), which nowadays luckily most websites are. Otherwise they can see the specific page, it’s content and most likely also all information you input on that page.
Do you use podman run followed by podman generate or are you using quadlet?
Quadlet is integrated in podman 4.4 and up and makes it possible to declare your containers in .container files that look like systems unit files and still get the full systems integration: https://www.redhat.com/sysadmin/multi-container-application-podman-quadlet
Many of the keys sold on key reselling sites are bought with stolen credit cards. It usually works like this:
Parking lots
Wow. Now you can finally build realistic American cities ;)