Back when I worked in spices, we treated everything as RTE knowing most of our B2B transfers were going into other products that would be cooked. This was because we knew some spices/blends were going straight to a facility for jarring for retail sale and some people sprinkle raw spices onto their plates of already cooked food.
Two the OP's two examples:
-The mushroom coffee is likely fine to consider NRTE, but your packages should include brewing instructions. Some of the most shocking facilities I've seen in my short consulting career were tea makers, because most companies with a "to-be-brewed" product get away with some surprising practices simply because they're claiming the food-item gets steeped in boiling water and passed through a filter by the consumer. Not saying OP is in this category, but just sharing an experience.
-The ice cream mix: is this like a powder a consumer mixes with milk and freezes to make ice cream? Or is it a topping? Either way, it should be treated as RTE by you and your team throughout all handling. I'm going to assume it is created with RTE ingredients that are either processed to already be safe (say sugar) or inherently safe (say salt), and unless it is something the customer needs to cook, you need it to remain safe and RTE since the customer is going to mix it with RTE and consume it without a home kill-step.
I'm always a little wary when management wants to start using the NRTE defense in foods. It's like they view NRTE as a hall pass to skimp on some of the PRP's and be a little loosy-goosy when managing risks.