WoWInterface - what 's the frame name of QueueStats frame and LFGstats frame？

It looks like its a Tooltip frame.

I'm not sure if tooltips can be shown permanently, but the blizzard code for the minimap buttons in question should show how the tooltip is filled with its information so that you can put it in a frame you can make permanent in that eventuality.

/fstack on the minimap buttons will give you their name and finding their Blizzard code somewhere in the files downloaded from the game - such as at ( https://www.townlong-yak.com/framexml/live ) will help you identifiy the code blocks in question.

This might be what you are looking for. From the minimap.lua file.

Lua Code:

function MiniMapInstanceDifficulty_OnEnter(self)
    local _, instanceType, difficulty, _, maxPlayers, playerDifficulty, isDynamicInstance, _, instanceGroupSize, lfgID = GetInstanceInfo();
    local isLFR = select(8, GetDifficultyInfo(difficulty))
    if (isLFR and lfgID) then
        GameTooltip:SetOwner(self, "ANCHOR_BOTTOMLEFT", 8, 8);
        local name = GetLFGDungeonInfo(lfgID);
        GameTooltip:SetText(RAID_FINDER, 1, 1, 1);
        GameTooltip:AddLine(name);
        GameTooltip:Show();
    end
end
function GuildInstanceDifficulty_OnEnter(self)
    local guildName = GetGuildInfo("player");
    local _, instanceType, _, _, maxPlayers = GetInstanceInfo();
    local _, numGuildPresent, numGuildRequired, xpMultiplier = InGuildParty();
    -- hack alert
    if ( instanceType == "arena" ) then
        maxPlayers = numGuildRequired;
    end
    GameTooltip:SetOwner(self, "ANCHOR_BOTTOMLEFT", 8, 8);
    GameTooltip:SetText(GUILD_GROUP, 1, 1, 1);
    if ( xpMultiplier < 1 ) then
        GameTooltip:AddLine(string.format(GUILD_ACHIEVEMENTS_ELIGIBLE_MINXP, numGuildRequired, maxPlayers, guildName, xpMultiplier * 100), nil, nil, nil, true);
    elseif ( xpMultiplier > 1 ) then
        GameTooltip:AddLine(string.format(GUILD_ACHIEVEMENTS_ELIGIBLE_MAXXP, guildName, xpMultiplier * 100), nil, nil, nil, true);
    else
        if ( instanceType == "party" and maxPlayers == 5 ) then
            numGuildRequired = 4;
        end
        GameTooltip:AddLine(string.format(GUILD_ACHIEVEMENTS_ELIGIBLE, numGuildRequired, maxPlayers, guildName), nil, nil, nil, true);
    end
    GameTooltip:Show();
end