Is this a SaaS product or litterly a product? If it’s a SaaS product make sure you have some kind of Analytics tool on it in combination with Hotjar for example so you can see what your users do by recordings and heatmaps. Hotjar also has a build in feedback button to show on your website.
If it’s a regular product, be sure to send a extra card with the product to people when sending the product. With this card you can focus on gathering reviews for example. There are tools like Feedbackcompany which you can use. You have to approve the review before it gets on there, so the bad once you can contact. Also gather reviews from e-mail, send a mail after x days if they used the product and how it was. Follow-ups after that can be to contact them.