Neal pointed me to:
https://github.com/rhinstaller/anaconda/blob/master/data/profile.d/
Is there some documentation about the profile format and options? Looking at:
https://github.com/rhinstaller/anaconda/blob/master/data/profile.d/fedora...
I wonder if I will luck out and this is as easy as modifying
fedora-kinoite.conf and fedora-silverblue.conf to include:
[Storage]
default_scheme = BTRFS
btrfs_compression = zstd:1
default_partitioning =
/
/var
/home
Thanks,
Chris Murphy