Yes. Just add the boot USE flag for systemd-utils. That will install the stub at /usr/lib/systemd/boot/efi/linuxx64.elf.stub.
There's a zfsbootmenu package that also has the EFI image generator too (that will use your own kernel), but I kept getting build errors so I used the release binary from their website. The package is still helpful because it contains all the ZFS scripts needed for dracut to load your encrypted ZFS root pool.