tsys is upstreaming them, but the manjaro kernel repo will be the mainline standard for some time. i use a patch for the pbp-install-linux script in pbp-tools.
you can see the to the manjaro changes rebased to the 5.8-rc1 repo here.
https://gitlab.manjaro.org/tsys/linux-pi.../v5.8-rc1/
you can see the to the manjaro changes rebased to the 5.8-rc1 repo here.
https://gitlab.manjaro.org/tsys/linux-pi.../v5.8-rc1/