Option to automatically add a product to a deal with workflows

I have recently started to use Hubspot and in my company, all deals are added as line products. So I cannot make a list according to the packages we offer since we cannot move line items to prospects. I see that this topic rolling on since 2018. I am not an expert but this feature shouldn’t be hard to accomplish for HubSpot. It is a shame to not having actually. What a pity!