UIWidgetTopCenterContainerFrame
I think there are lot more "ContainerFrames" but I am not for sure whether they also have tooltip or not .
Anyway, You can easily reproduce this one when you are in bastion
/way 51.2, 68.8
https://imgur.com/a/GlcdWJl
or in HoA, after entering dungeon you can see halkias anima bar
infobox of buildings that has ranks in GarrisonBuildingFrame.MapFrame / GarrisonBuildingFrame.BuildingList(RightSide of building window, List)
https://imgur.com/a/zDuAbb2
P.S II
You can easily reproduces these at PTR. There's NPC in oribos that teaches you legendary powers and gives you all of your followers.
This is not tiptac styled border but, when using addon LS: toasts, tips of frames that popped up when learing legendary powers(at runeforge) are not quality bordered yet
https://imgur.com/a/t6sFDPz
Dunno What's this frame but when you got followers for your garrison, it's popped up window's tip
https://imgur.com/a/zQaILOM
UIWidgetTopCenterContainerFrame I think there are lot more "ContainerFrames" but I am not for sure whether they also have tooltip or not . Anyway, You can easily reproduce this one when you are in bastion /way 51.2, 68.8 https://imgur.com/a/GlcdWJl or in HoA, after entering dungeon you can see halkias anima bar
infobox of PVPUIFrame https://imgur.com/a/Nmw5kFn
infobox of buildings that has ranks in GarrisonBuildingFrame.MapFrame / GarrisonBuildingFrame.BuildingList(RightSide of building window, List) https://imgur.com/a/zDuAbb2
Addon TomTom tooltip(not sure there are other than minimap tips) https://imgur.com/a/PJsZfFo
Item tooltip for EncounterJournalSuggestFrame Not so sure wether it's tooltip https://imgur.com/a/BbeGVVJ
P.S I also found those stuffs in thorghast(higher level with blessing and curse) , Other container frames.
ThorghastLevelPickerFrame.GridLayoutContainer https://imgur.com/a/zEEFr52
EventToastManagerFrame.currentDisplayingToast.WidgetContainer https://imgur.com/a/MCFju8n
EventToastManagerFrame.currentDisplayingToast.ExpandWidgetContainer https://imgur.com/a/MCFju8n
P.S II You can easily reproduces these at PTR. There's NPC in oribos that teaches you legendary powers and gives you all of your followers.
This is not tiptac styled border but, when using addon LS: toasts, tips of frames that popped up when learing legendary powers(at runeforge) are not quality bordered yet https://imgur.com/a/t6sFDPz
Dunno What's this frame but when you got followers for your garrison, it's popped up window's tip https://imgur.com/a/zQaILOM