Do have several GA4 properties with similar defined custom fields. They do also end-up perfectly in Looker Studio when connecting directly to GA4 property.
Completely useless results when using data control to switch GA4 property. A filed defined as e.g. "Customer Hair Colour" in all required properties cannot be displayed in Looker Studio with data control. Looker Studio seems to match technical field name of GA4 custom field and not as expected with name "Customer Hair Colour".
With that re-use of reports based on GA4 properties with - at least based on what you can define - similar structure, cannot be used as soon as custom fields are involved.
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