Where do I find the WP revisions?

Unfortunately I can’t find any revisions, I’ve read the description of where they should be (on the page under documents and then “Status & Visibility”).
But none of that can be seen on my page. Where can I find the revisions?
And why have the headline fonts changed on other sites as well? (Other typo and standard and bold no longer differentiated). I didn’t change it!

According to my provider, 10 revisions are set and activated if you install the WP via their software installer and I have.
Please send me a solution quickly because I can’t continue working with the destroyed demo. Thanks in advance.

Best regards,
Nic