Hi @araalghamdi
See the documentation here: https://confluence.atlassian.com/doc/delete-or-restore-a-page-139429.html#DeleteorRestoreaPage-Restoredeletedpages
Pages are restored to the root of the space. Head to Space Tools > Reorder Pages to drag your restored page back into the page hierarchy.
Means, the page isn't going to be the homepage after you restore it. It's just a page in the root page. You have to reorder the pages and set the new homepage again.
Regards, Dominic