I’ve seen replies like this but nothing seems to be working:
Go to your Shopify admin, navigate to Products, and select the products you want to exclude; add a unique tag like “no-recommend” to each one. Then, in Online Store > Themes, click “Customize” on your Impact theme, find the Product page settings, and look for the “Product recommendations” section (it might be under a block like “Related products”). edit the product-recommendations.liquid or related-products.liquid file in your theme code (Online Store > Themes > Actions > Edit Code), and add a condition like {% unless product.tags contains ‘no-recommend’ %} to exclude them.
Have attached a pdf of our snippet code: