if you need this .sh file, you can use the command like:
DISTRO=fsl-imx-wayland MACHINE=imx8mmevk source imx-setup-release.sh -b build-wayland
bitbake image -c populate_sdk, for example choose core-image-minimal as image, then use the command like :
bitbake core-image-minimal -c populate_sdk, then you can find this under "build-wayland/tmp/work/imx8mmevk-poky-linux/core-image-minimal/1.0-r0$"