projectOS-yocto-bsp/
├── myproject-coral-bsp/
│   ├── conf/
│   │   ├── layer.conf
│   │   └── machine,distro folders
│   └── meta-myproject-coral(also oe,poky layers. not inside this layer but next to it.)
│       └── (Coral Dev Board's BSP recipes)
├── myproject-cm4-bsp/
│   ├── conf/
│   │   ├── layer.conf
│   │   └── machine,distro folders
│   └── meta-myproject-cm4(also oe,poky layers. not inside this layer but next to it.)
│       └── (CM4's BSP recipes)
│
└── meta-myproject-common/
    ├── conf/
    │   └── layer.conf
    └── recipes/
        └── (common recipes)