What layer/object should I add a Helper method to get all Product objects from?

I have a Helper class and a Service class currently and I read this other question about the difference between a service class and a helper class and got confused. A method to get all products in my situation is just a convenience thing for me from a developer point of view as it is used to get all products for a specific account and this logic is used across the application. Therefore I was thinking to add it in the Helper class but is it a “utility” if it has to query the database?

Our service classes are very specific for application features rather than 1 database table corresponding to 1 service. I have seen other applications use the latter approach and was wondering if we were using services and helper classes in a non-SE way.

What’s your opinion? What layer/object should I be using for this (to query all products relating to an account)?