How To Search Someone’s Timeline On Facebook’s Website:-
Desktop Instructions
To search someone's timeline on Facebook, go to their profile.
To open a new menu, click the three-dot icon on the right side of the screen.
Select the 'Search' button with the magnifying glass next to it.
Enter the search terms you want to use.
Select "Search This Profile For..."
A new page with your search should load after you wait.
Mobile Instructions
To search someone's timeline on Facebook, go to their profile.
To go to a new page, tap the icon with three dots next to the "Message" button.
Click "Search."
Whatever you want to search for, type it in.
Click "See results for."