I've installed the impish kernel 5.13.0-32 on top of jammy; zfs module loads fine:
$ uname -r 5.13.0-32-generic
$ modinfo zfs | grep filename: filename: /lib/modules/5.13.0-32-generic/updates/dkms/zfs.ko
$ strings /lib/modules/5.13.0-32-generic/updates/dkms/zfs.ko|grep -e vermagic= -e GCC -e ^version=|sort -u GCC: (Ubuntu 11.2.0-13ubuntu1) 11.2.0 vermagic=5.13.0-32-generic SMP mod_unload modversions version=2.0.6-1ubuntu3
I've installed the impish kernel 5.13.0-32 on top of jammy; zfs module loads fine:
$ uname -r
5.13.0-32-generic
$ modinfo zfs | grep filename: 5.13.0- 32-generic/ updates/ dkms/zfs. ko
filename: /lib/modules/
$ strings /lib/modules/ 5.13.0- 32-generic/ updates/ dkms/zfs. ko|grep -e vermagic= -e GCC -e ^version=|sort -u 5.13.0- 32-generic SMP mod_unload modversions 2.0.6-1ubuntu3
GCC: (Ubuntu 11.2.0-13ubuntu1) 11.2.0
vermagic=
version=