I am working on a Create Opportunity flow. Our team needs to state on the Opportunity which countries are relevant to it. I have a requirement to present the team with a multi choice picklist that will only include the countries which the Account operates in.
So, for example, Company A has a field "countries the company operates in" with USA, Australia and UK selected. We want the create opportunity screen to only show those three countries as potential choices for "countries related to this opportunity".
I can convert the selected Account countries to a text collection, but I can see no way to turn the text collection into a choice set that can be used with picklist or radio buttons. Nor do I see a way to have a selection on the screen that doesn't require a choice set. I also tried to get all picklist value into a choice set, thinking I'd be able to remove those choices that aren't present in the relevant Account record, but I see no way to remove options from the choice set either. So I'm stuck!