The EcoCart product appears the carbon neutral order turns up in 'you might like' section. Is there a way to hide it without upsetting how it works?

EcoCart can be excluded from the logic of being included in these recommendation carousels. It's similar to this video here: Here are instructions on how to hide EcoCart from any collection within your Shopify store. Keep in mind that the recommendation carousel you’re referring to might be only accessible via your theme, in which case your developer may have to help.