Where are proto dhcp and proto dhcpv6 (UCI) documented?

It's understandable that everything possible in /etc/config/network isn't on a single wiki page. However in breaking it into multiple pages the basic dhcp protocols got lost.

There is this "basics" page
https://openwrt.org/docs/guide-user/base-system/basic-networking
and this one is linked to the UCI pages, it is seems like either a previous or later version of the page above.
https://openwrt.org/docs/guide-user/network/ucicheatsheet
then also this page about WAN-specific protocols, but not including dhcp or dhcpv6.
https://openwrt.org/docs/guide-user/network/wan/wan_interface_protocols

Does anyone know of more pages or can work to extend this so that dhcp is documented?