How flash Android11(AOSP11) A/B OTA .zip file into target

Followed below steps :

1. Compiled the source code
2. $mkdir dist_output
3. $make dist DIST_DIR=dist_output
4. $./out/target/product/rk3399_ROCKPI4B_Android11/otatools/releasetools/ota_from_target_files dist_output/rk3399_ROCKPI4B_Android11-target_files-eng.test1-test.zip update1.zip

2022-05-27 15:43:16 – common.py – WARNING : Failed to read SYSTEM/etc/build.prop

2022-05-27 15:43:16 – common.py – WARNING : Failed to read VENDOR/etc/build.prop

2022-05-27 15:43:16 – common.py – WARNING : Failed to read PRODUCT/etc/build.prop

2022-05-27 15:43:16 – common.py – WARNING : Failed to read SYSTEM_EXT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read VENDOR/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read PRODUCT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM_EXT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read VENDOR/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read PRODUCT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM_EXT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read VENDOR/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read PRODUCT/etc/build.prop

2022-05-27 15:43:38 – common.py – WARNING : Failed to read SYSTEM_EXT/etc/build.prop

2022-05-27 15:43:39 – ota_from_target_files – WARNING : Duplicate block difference found. Device specific block diff for partition ‘system_ext’ overrides the one in generic script.

2022-05-27 15:43:39 – ota_from_target_files – WARNING : Duplicate block difference found.
Device specific block diff for partition ‘product’ overrides the one in generic script.

2022-05-27 15:43:39 – ota_from_target_files – WARNING : Duplicate block difference found. Device specific block diff for partition ‘odm’ overrides the one in generic script.

Compressing system.new.dat with brotli

Compressing vendor.new.dat with brotli

Compressing product.new.dat with brotli

Compressing odm.new.dat with brotli

Compressing system_ext.new.dat with brotli

write trust now…

write uboot now…

warning: no vbmeta.img in input target_files; not flashing vbmeta

wirte dtbo now…

no charge img; ignore it.

info: no resource image; ignore it.

no RKLoader.bin, ignore it.

info: no vendor_boot.img in input target_files; ignore it

info: no logo image; ignore it.

Update1.zip file is created. Is those process is proper , I need to do any more changes and How to flash A/B OTA .zip file into target device

Ref links :
source.android.com/devices/tech/ota/tools

Unable to create AB OTA zip file in AOSP 11