firmware drivers
This sounds like you're talking about firmware blobs that the kernel drivers load, which are usually in a package called linux-firmware. It should be updated automatically, but I'll check in the morning with Fedora Silverblue.
Otherwise if you're talking about device firmware, than that's all fwupd, rpm-ostree has nothing to do with that.
The options that start with
HAVE_usually depend on the arch or compiler. I don't believe it's possible to enable manually without modifying the source itself.