I'm having trouble getting B2B guests being able to view a power app we created on our system.
The organization I work for has a power apps for its employees, and our B2B guests authenticated through Azure AD also have power apps on their host tenant. According to >this< Microsoft page, if the B2B guest has power apps at their tenant, then they should be able to access our power app without assigning a license. But when the B2B guests try to access our app they are greeted with a display stating they need a power apps plan (but both tenants definitely do):

What do we have to do in order to get our B2B guests the ability to access our power app, using their host tenants license?