Hi Looker Studio experts
I’m currently working on a project that connects directly to GA4 data in Looker Studio, and I have a question about calculated fields within a scorecard.
I’d like to create a custom metric that shows the percentage of users from “Direct” under the dimension “First user default channel group”, divided by the total number of users — without using filters.
Has anyone successfully done this before? I’d really appreciate any insights or best practices you can share 
Thanks in advance!