[monsieurbanana]

3 possibilities I can think of:

- automatically scrapping websites - paying someone to do the work manually - who knows, there might be a database that someone else maintains, free or paid, and the website just displays the information

Or a mix of all that.

[kingofpandora]

Or the information isn't up-to-date ... This is the kind of thing you always should check on an embassy or other government page.

[sillycube]

Finally, the visitors will go to the official site to verify the visa requirements. When the covid is around, the visa requirements are changed by the gov frequently