Morello Linux missing /lib/modules

I am running

Linux morello 6.7.0-g96c45a786534 #1 SMP PREEMPT Tue Apr 30 17:43:10 UTC 2024 aarch64 GNU/Linux

and I have two problems:

1. There seems to be no kernel-headers package available for download.
2. The entire /lib/modules directory is missing.  When I "lsmod," it shows nothing.  Searching for a modules directory turns up nothing.

I'm guessing this is a custom-compiled kernel.  How can I get the modules for it?  Thanks!