Hi @SVC2,
I just built this BSP version for Machine imx7dsabresd successfully using Ubuntu 20.04.5 LTS.

I have some advice for you:
1. Use the following manifest to correctly use the repo tool: GitHub - nxp-imx/imx-manifest at imx-linux-kirkstone
2. Then use the following command to set the build environment: MACHINE=imx7dsabresd DISTRO=fsl-imx-fb source ./imx-setup-release.sh -b build
3. Finally, use this command to start with the build process: bitbake fsl-image-machine-test
Also, is important to set properly the Host Environment you will need to follow the Yocto Project User's Guide for LF5.15.32_2.0.0:
sudo apt install gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm python3-subunit mesa-common-dev zstd liblz4-tool rsync curl
Also you can follow the Yocto Project documentation (Yocto Project Quick Build — The Yocto Project ® 4.0.6 documentation) and use the following command to set properly your host environment:
sudo apt install gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm python3-subunit mesa-common-dev zstd liblz4-tool
I hope this information will be helpful.
Have a great day!