When I create my own meta layer and add it to bblayers.conf for compilation, I found that the recipes in my own meta layer are not applied to the image after successful compilation. 
Initially, I attempted to add a system user in my custom recipes without success. Later, I also tried the recipes-skeleton/hello-single from meta-skeleton (placing recipes-skeleton under meta-example), but it was not successful either. Did I miss something?


My meta layer (meta-example) structure is as follows:

-poky
  + bitbake
  - build
    - bblayers.conf
    - local.conf
    - ...
  - meta-example
    - conf
      - layer.conf
    - recipes-core
      - images
        - core-image-user.bb
  + ...


My layer.conf

# We have a conf and classes directory, add to BBPATH
BBPATH .= ":${LAYERDIR}"

# We have recipes-* directories, add to BBFILES
BBFILES += "${LAYERDIR}/recipes-*/*/*.bb ${LAYERDIR}/recipes-*/*/*.bbappend"

BBFILE_COLLECTIONS += "meta-example"
BBFILE_PATTERN_meta-example = "^${LAYERDIR}/"
BBFILE_PRIORITY_meta-example = "6"

LAYERDEPENDS_meta-example = "core"
LAYERSERIES_COMPAT_meta-example = "nanbield"


My core-iamge-user.bb:

SUMMARY = "Root and user"
DESCRIPTION = "Recipe for root and user"
LICENSE = "MIT"

inherit image
IMAGE_INSTALL = "sudo"

inherit extrausers
EXTRA_USERS_PARAMS += "\
    useradd epiroc; \
    usermod -p '$(openssl passwd -6 Epiroc24680)' epiroc; \
    usermod -a -G wheel epiroc; \
    usermod -p '$(openssl passwd -6 lucio13570)' root \
    "

update_sudoers() {
    sed -i 's/# %sudo/%sudo/' ${IMAGE_ROOTFS}/etc/sudoers
}

ROOTFS_POSTPROCESS_COMMAND += "update_sudoers;"


It's quite strange that throughout the compilation process, there were no errors, and even when intentionally modifying my custom recipes (changing "inherit extausers" to "inherit extrauser"), an error is still reported. This indicates that the .bb files have been successfully loaded.