DHCP6 Address Reservations

After checking FortiOS 7.4.4 there is no option to reserve dhcpv6 IPs:

DHCPv6 there is no reserve option:

config system dhcp6 server
edit 1
set status enable
set rapid-commit disable
set lease-time 604800
set dns-service specify
set dns-search-list specify
set domain ''
set subnet ::/0
set interface "port2"
set option1 0
set option2 0
set option3 0
set ip-mode range
set dns-server1 ::
set dns-server2 ::
set dns-server3 ::
set dns-server4 ::
next
end

While with DHCP v4 there is reserved-address section

config system dhcp server
edit 2
set dns-service default
set default-gateway 172.16.1.1
set netmask 255.255.255.0
set interface "port2"
config ip-range
edit 1
set start-ip 172.16.1.2
set end-ip 172.16.1.254
next
end
config reserved-address
edit 1
set ip 172.16.1.2
set mac 00:64:65:6c:2b:02
next
end
next
end