diff --git a/changelogs/fragments/11630-nmcli-ipv6-routing-rules.yml b/changelogs/fragments/11630-nmcli-ipv6-routing-rules.yml
new file mode 100644
index 0000000000..c47dd0b06b
--- /dev/null
+++ b/changelogs/fragments/11630-nmcli-ipv6-routing-rules.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - nmcli - add missing ``ipv6.routing-rules`` to ``settings_type()`` list type, which caused ``routing_rules6`` list values to be corrupted (https://github.com/ansible-collections/community.general/issues/11630).
diff --git a/plugins/modules/nmcli.py b/plugins/modules/nmcli.py
index 0dfc796681..de98a9013e 100644
--- a/plugins/modules/nmcli.py
+++ b/plugins/modules/nmcli.py
@@ -2372,6 +2372,7 @@ class Nmcli:
             "ipv6.dns-search",
             "ipv6.dns-options",
             "ipv6.routes",
+            "ipv6.routing-rules",
             "802-11-wireless-security.group",
             "802-11-wireless-security.leap-password-flags",
             "802-11-wireless-security.pairwise",
diff --git a/tests/unit/plugins/modules/test_nmcli.py b/tests/unit/plugins/modules/test_nmcli.py
index a57a9ef07c..f32585d6c0 100644
--- a/tests/unit/plugins/modules/test_nmcli.py
+++ b/tests/unit/plugins/modules/test_nmcli.py
@@ -2260,6 +2260,8 @@ def test_generic_connection_modify_routing_rules6(mocked_generic_connection_crea
     args, kwargs = arg_list[0]
 
     assert "ipv6.routing-rules" in args[0]
+    idx = args[0].index("ipv6.routing-rules")
+    assert args[0][idx + 1] == "priority 5 from fd00::/24 table 5000,priority 10 from fd01::/24 table 5001"
 
     out, err = capfd.readouterr()
     results = json.loads(out)