Please provide some relevant screenshots of the specific area that you are facing with the URL of the page to check it myself and help you out accordingly.
Because your current explanation is not clear enough to understand what you require.
I saw the screenshot you attached and visited your website.
Sorry but I am still unable to see the issue as you mentioned. Please provide me with some relevant screenshots of the specific area where the issue comes to check it myself and help you out accordingly.
Because without seeing the issue I am unable to suggest to you any solution.
The problem is that this anchor is a default browser behavior. We are not able to change the offset for the anchor link. It is not a sticky header problem and it doesn’t have any relation to the actual section ID.
The only workaround here is to add your ID anchor on the page not to the actual title but to some element above it. You can even use some hidden element but it should contain the ID which you want your page scroll to.