problem with sticky menu

You can target the class .easy-footnote-margin-adjust with CSS to give it a negative margin-top which should allow for moving the target ID higher on the page.

Here’s an article for a similar issue I’ve written using Gravity Forms. https://jasonyingling.me/quick-tip-anchor-scrolling-with-gravity-forms-and-fixed-navigation/

Hello can you give me exatly guide where to write it?
is it in style.css or just in customize theme css?

and what to write?
.easy-footnote-margin-adjust
height-100 ?

or
..easy-footnote-margin-adjust ::before {
content: “”;
display: block;
width: 0;
height: -100px;
margin: -100px 0 0;
}

You can add it either directly to they style.css or you can just add it through the customizer Additional CSS tab.

This should work to move things up 100px on your site.

.easy-footnote-single {
    position: relative;
}

.easy-footnote-margin-adjust {
    position: absolute;
    top: -100px;
}