[zork]

https://wow.gamepedia.com/API_GameTooltip_SetOwner

local function SetDefaultAnchor(self, parent)
  local xOffset, yOffset = 0, 0
  if InCombatLockdown() then
    self:SetOwner(parent, "ANCHOR_NONE")
  else
    self:SetOwner(parent, "ANCHOR_CURSOR", xOffset, yOffset)
  end
end
 
hooksecurefunc("GameTooltip_SetDefaultAnchor", SetDefaultAnchor)

Put the above in here and give your addon a desired name.
https://addon.bool.no/