Hi @Maxim Kashaev ,
welcome to the Atlassian community!
https://confluence.atlassian.com/doc/view-insights-on-your-site-1044780335.html allows you to check who and when accessed specific pages of your instance.
How much time user spent on a single page, in my opinion, is very hard to check because user could open a page in a tab and let it open for hours without performing actions.
Fabio
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