I am on 6.1.8 and have iptable_mangle
root@Tower:~# lsmod
Module Size Used by
xt_CHECKSUM 1071 1
ipt_REJECT 1193 2
nf_reject_ipv4 2203 1 ipt_REJECT
ebtable_filter 1671 0
ebtables 14192 1 ebtable_filter
kvm_amd 44207 3
kvm 251442 1 kvm_amd
vhost_net 7781 1
vhost 12549 1 vhost_net
macvtap 9003 1 vhost_net
macvlan 11713 1 macvtap
iptable_mangle 1376 1
tun 16465 8 vhost_net
xt_nat 1665 16
veth 4401 0
ipt_MASQUERADE 981 16
nf_nat_masquerade_ipv4 1649 1 ipt_MASQUERADE
iptable_nat 1615 1
nf_conntrack_ipv4 5626 12
nf_nat_ipv4 4111 1 iptable_nat
iptable_filter 1280 2
ip_tables 9310 3 iptable_filter,iptable_mangle,iptable_nat
nf_nat 9789 3 nf_nat_ipv4,xt_nat,nf_nat_masquerade_ipv4
md_mod 30680 7
it87 23702 0
hwmon_vid 2028 1 it87
fam15h_power 2406 0
k10temp 2684 0
r8169 57464 0
mii 3339 1 r8169
i2c_piix4 7688 0
ahci 24107 6
mpt2sas 148914 6
libahci 18687 1 ahci
raid_class 3116 1 mpt2sas
scsi_transport_sas 21182 1 mpt2sas
acpi_cpufreq 6074 0