It can’t be both. Building Support is a subcategory of Help and Feedback with the function to get assistance related to basic to complex problems in producing buildings, architecture, physics, and modeling on Roblox Studio.
As @oofdog4526 stated, it fits properly on Creations Feedback in the sense of receiving support and/or needing feedback and what your creation can be improved.
Ultimately, check out the pinned topics on how to use the Developer Forum categories if you are struggling to know in which area you should post next time!
