Sure we can come up with something for you. Is it possible that the posts you want to remove the feed from are all in a certain category? That would be the easiest. Otherwise, let me know if that isn't the case. Here is the strategy for categories:
First, look up the slug or slugs of the category of posts you'd like to hide the feed on. See this screenshot for where you can find that in the WordPress dashboard: https://snag.gy/UEJWlH.jpg
You can use that slug to target posts in that category with CSS. You would just add a period "." the word "category" and a dash - .category-
For example, this would hide the feed for all posts in the beauty and skincare category. Place it in the "Custom CSS" area on the "Customize" tab of Instagram Feed:
.category-beauty-skincare #sb_instagram {
display: none;
}
You can repeat this pattern for all of the posts you need to remove the feed from, just change the highlighted part.
Let me know if this isn't what you needed.