Configuration for PlatformIO supported boards that are not yet in ESPHome

Has anyone been able to properly configure a board that is listed as supported by PlatformIO, but not yet in ESPHome? If so, what are your configuration settings? This post is not about me trying to troubleshoot my yaml, so I’m not posting it here. I’ve tried that and it dead-ended twice. I’m trying to get some example syntax to work from. Also, please don’t post a link to an ESPHome page that explains how to do this. I’ve read them.

Thank you for your help.