Nisarg menu : Current menu item

Hello,

i created a children theme of Nisarg.
I created 6 different pages for the primary menu on top. I crated custom post type with an archive-$customposttype.php to display on one page.
The problem is, for this particular page (archive-$customposttype.php), when we click on it in the menu, there is no border on top of it which appears. when i inspect the code, there is no “current-menu-item” class.
Is there a way to add it so the border on top will be displayed again ?

Thank you very much for you help.