You should definitely request this feature via their customer support or similar. I've found small companies are often love hearing from their users and are quite responsive to these kind of requests.
I also switched from paprika to PlanToEat, and in general like it, however, they never respond to emails in the usual ways, so it feels like a black hole sending bug reports or feature requests.
They would usually fix bugs a few months later, so I do presume someone is reading the email, but yeah, expect silence if you do reach out.
That said, I’m still happy enough to recommend using them.
Haven't tried PtE, may give it a go at some point.
But just mentioning Paprika does indeed allow you to populate your shopping list from your meal plan, or from an individual recipe. I use this feature frequently.
Https://plantoeat.com
It has the same features as Paprika but Generates a shopping list from your meal plan. Saves a ton of time when shopping.
The one thing I don’t like about PtE is you can’t mark off ingredients as you prep them. Paprika has this and I miss it.