According to your description, you want to use hidden fields in Power BI Report Builder, unfortunately, at present, Power BI Report Builder does not support the direct invocation of hidden fields, if you want to use hidden fields in Power BI Report Builder, you need to publish the field in Desktop before the field will be unhidden. You can submit an idea for here and the product team will take note of such a need.
Related Link: New tab (powerbi.com)
Best Regards,
Yang
Community Support Team
If there is any post helps, then please consider Accept it as the solution to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!
How to get your questions answered quickly -- How to provide sample data in the Power BI Forum
