https://help.searchanise.com/support/solutions/articles/11000016269-how-to-add-a-search-box-to-a-shopify-theme#:~:text=Go%20to%20Shopify%20admin%20panel,it%20in%20the%20Header%20part.
@Fraru3 Check out this link it will help you.
Let me know if you need any thing else Thank you