I'm a psychiatrist. Not only would it be expensive, but the functional MRI (at least right now in 2022) would be highly unlikely to provide useful information a

I'm a psychiatrist. Not only would it be expensive, but the functional MRI (at least right now in 2022) would be highly unlikely to provide useful information about how to manage your depression, or what medication (or psychotherapy) would likely help. Perhaps the one exception is that it could help pick a site for TMS.