Maybe this info helps:
https://www.esoui.com/forums/showthr...ht=leaderboard
Else check the current API txt files linked in the APIVersion history of the wiki:
https://wiki.esoui.com/APIVersion
The ESOUIDocumentation files are the ones to look into. You should find leaderbaord related stuff in there if it exists.
Just do a text search for pvp, rank, ava, board, leader or similar search terms.
The source code of the leaderboards can be found here:
https://github.com/esoui/esoui/tree/...e/leaderboards
The AVA one should be this
https://github.com/esoui/esoui/blob/...rds_shared.lua
-> basing on ZO_LeaderboardBase_Shared:
https://github.com/esoui/esoui/blob/..._shared.lua#L5