Comment 5 for bug 2049540

What is the problem here? Is there any proof that these modules are needed?

These four commit refer to bug #2031841 and cause the difference:

Filter net kernel modules by symbol regexp from dracut
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/initramfs-tools/commit/?id=55a7cf12c037ccd14a0241aa8cab085f6f8590d8

Filter block kernel modules by symbol regex from dracut
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/initramfs-tools/commit/?id=7ef0f4f446abe98434dcffffd2410247f95b0983

Install all usb/typec kernel modules
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/initramfs-tools/commit/?id=aa8821f6ad59d9ce8f8cacddc5f8ae7e41178b71

Do not install ARM/RISCV specific modules on other architectures
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/initramfs-tools/commit/?id=2df78bbb143884b9601a32608e12e43d40ccb0b0

Using symbol regexes will be more fine-grained than including whole directories.