Hey there Yazeed,
Hope you’re well today ??
For this you’ll have to make changes to your theme header.php. I’d suggest creating a child theme, then making a copy of header.php there and then making changes in your child theme. By doing this you’ll avoid your changes being lost once you update the theme.
Once you do that you can replace code in header.php with the following one https://pastebin.com/7nNrr87i.
What I did there was simply called get_search_form function and added a holder with specific class which we can later use to move it within the header.
Please let me know when you do this so we can position it with some CSS.
Best regards,
Bojan