Essentially, you’ll only see certain dimensions available to filter for if they have already been recorded within Klaviyo. If not, you can still create filters and splits off of them; you’ll just want to manually enter the dimension you’re looking to target. Keep in mind though that when manually creating these definitions that the input must be in an exact match format as those input fields are spelling and case sensitive.
Essentially, you’ll only see certain dimensions available to filter for if they have already been recorded within Klaviyo. If not, you can still create filters and splits off of them; you’ll just want to manually enter the dimension you’re looking to target. Keep in mind though that when manually creating these definitions that the input must be in an exact match format as those input fields are spelling and case sensitive.