I don’t know the answer to that. In most themes you would start looking in either index.php or a custom template for the home page. Yes, the fields themselves are managed by ACF, but the output of those fields is determined by the theme and/or the developer that built that theme. Since the theme you mention is a premium theme, unless someone else has access to that theme and understands how it works, it will be hard for you to get any help here. I can’t even find any documentation on the authors site https://themes.tielabs.com/sahifa/
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users