We used to be able to do this until an "Upgrade" took place in the past week or two. Now product can only be searched by a behind the scenes numeric value. Instead, we have to filter by 'name' and the name has to be the exact to the letter value. 2 weeks ago, we could start typing the name of the product (when searching my product instead of the confusing search by name requirement) and the product potential results populated. This update has caused significant pain by making things far more difficult to do. Please roll back your 'upgrade' Hubspot if you read this.
Welcome to the Community! Just to make sure I fully understand your question, you would like to filter deals by-product? If so, at this time it is not currently possible to filter deals by being associated with a product, however as a workaround, I was able to create a custom report to show deals and the products associated with them.
I would highly recommend you to please post this idea at our ideas forum (here).
Our product team, who monitors the forum regularly, can read your specific use case and understand why this would be a useful functionality or change. It also helps other customers facing the same issue to advocate for its implementation on your behalf by upvoting on the thread as well.