I’ve figured it out with a little more creative searching and also taking the mantra ‘the measure is the treasure’ to heart. With the guidance from Iterate though issue level filtering by Pages, I updated it like so and it works (also changed Count to Sum in the process and can’t be bothered to go back):
Sum(
Filter(
[Issue].Members,
[Measures].[Issues created] > 0
),
IIf(
NOT IsEmpty(<measure that returns field name>),
1, 0
)
)