How can I get a search window/function on my GP Pro website?

Hello,

I have tried the Customizing - Layout - Blog settings. I added ticks to Use infinite scroll and Use button to load more posts, but I cannot add a search function in Generate Press Pro

QUESTION: How can I get a search window/function (Look like magnifying search) on my GP Pro website? I think this is called Ajax Search - is there a way to activate this in GP Pro OR is a separate plugin required? (I want the least impact on SiteSpeed, so would rather not have it if it will slow the site down in any way)

Please advise. Thanks in advance