Luai's post in Hiding the products of a category from the main store, while keeping the link for that category visible on the main store was marked as the answer
I got it for anyone who's running into the same issue.
.nested-category-children ~ .products-flex-container .tag-prints
display: none !important; } </style>
So you use the tag of the category you're trying to hide after the .products-flex-container but make sure to put a space before .tag-"whatever your tag is"