Requirements of RFC7084 L-14

I'm working on requirements of RFC7084 L-14 now.
I found there were another topic talk about L-13 & L-14 in 2018.
Seems L-13 & L-14 already implement in odhcpd.
When prefix delegated is changed, RA will send a preferred time with zero for deprecated prefix. (L-13)
For L-14, I do not get any ICMPv6 Destination Unreachable message code 5 (source address failed ingress/egress policy) when I send the packet with deprecated prefix as the source address.

I'm working on v21.02.0-rc1, does RFC7084 L-14 support on it ?

Following information are my ip -6 rule & ip -6 route.
Seems 4200000012 failed_policy has no change to match?

0:	from all lookup local
32766:	from all lookup main
4200000000:	from 2011:1333:111a:100::1/60 iif br-lan unreachable
4200000001:	from all iif lo failed_policy
4200000008:	from all iif wan failed_policy
4200000012:	from all iif br-lan failed_policy
default from 2011:1333:111a:100::/56 via fe80::9005:3ac2:bd67:5509 dev wan proto static metric 384 pref medium
default from 2011:1333:1444:1555::2 via fe80::9005:3ac2:bd67:5509 dev wan proto static metric 384 pref medium
default from 2011:1333:1444:1555::/64 via fe80::9005:3ac2:bd67:5509 dev wan proto static metric 384 pref medium
2011:1333:111a:100::/64 dev br-lan proto static metric 1024 pref medium
unreachable 2011:1333:111a:100::/56 dev lo proto static metric 2147483647 pref medium
2011:1333:1444:1555::/64 dev wan proto static metric 256 pref medium
unreachable 2011:1333:1444:1555::/64 dev lo proto static metric 2147483647 pref medium
fe80::/64 dev eth0 proto kernel metric 256 pref medium
fe80::/64 dev br-lan proto kernel metric 256 pref medium
fe80::/64 dev wan proto kernel metric 256 pref medium