I made it as a way to test things as root until more is discovered. For example:
Gflip6_TF:/data/local/tmp $ echo 'cat /vendor/build.prop' > 3.sh; sleep 5; cat 3.out | head
ro.boot.dynamic_partitions=true
ro.product.first_api_level=30
ro.vendor.build.security_patch=2021-09-05
ro.vendor.product.cpu.abilist=armeabi-v7a,armeabi
ro.vendor.product.cpu.abilist32=armeabi-v7a,armeabi
ro.vendor.product.cpu.abilist64=
ro.product.board=gflip6
ro.board.platform=mt6739
ro.hwui.use_vulkan=
Gflip6_TF:/data/local/tmp $