Hi,
Are you using Dynamics AX or D365FO?
To me your question seems to be related to D365FO.
For D365FO, you can find information on the following blog and docs websites:
community.dynamics.com/.../ax-7-how-to-add-financial-dimensions-as-separate-columns-to-data-entity
docs.microsoft.com/.../dimensions-overview
It requires some code modification but the description provided seems to be quite clear.
Please let us know if this answers your question.
Best regards,
Ludwig