I have it enabled in the add-on config but I'm only seeing the default Blizzard bags.

Edit: Turned out only one toon had that symptom, others got a ton of LUA errors, the only one I could identify was an apparent incompatibility with Caerdon Wardrobe Bagnon add-on, once I disabled that add-on the errors seemed to go away.

I'm going to revert back to an earlier version for now.

Edit2: I reverted back to the previous release and things are fine. I tried disabling the Caerdon add-on again to see how it compared and noticed that an iLvl display on my bag gear items was showing up in 7.3.2 that wasn't showing up in 7.3.11, in case that's a core function of Bagnon that I've always taken for granted it seems to not be working in 7.3.11.

In case this helps somehow, I don't think Caerdon author is updating the Bagnon add-on anymore:

Message: ...terface\AddOns\CaerdonWardrobeBagnon\Core.Bagnon.lua:41: attempt to index field 'Cache' (a nil value)
Time: 05/08/18 23:27:52
Count: 1
Stack: ...terface\AddOns\CaerdonWardrobeBagnon\Core.Bagnon.lua:41: attempt to index field 'Cache' (a nil value)
...terface\AddOns\CaerdonWardrobeBagnon\Core.Bagnon.lua:41: in function <...terface\AddOns\CaerdonWardrobeBagnon\Core.Bagnon.lua:35>
[C]: ?
[C]: ?
[C]: in function Update' ...AddOns\Bagnon\external\Wildpants\components\item.lua:127: in function <...AddOns\Bagnon\external\Wildpants\components\item.lua:122> [C]: in function Show'
...AddOns\Bagnon\external\Wildpants\components\item.lua:30: in function `New'
...s\Bagnon\external\Wildpants\components\itemFrame.lua:119: in function <...s\Bagnon\external\Wildpants\components\itemFrame.lua:108>

Locals: self = ContainerFrame1Item1 {
0 =
bag = 0
BattlepayItemTexture = {
}
count = 1
newitemglowAnim = {
}
BagStaticTop = {
}
flash = {
}
info =

{
}
frame = BagnonFrameinventory {
}
scheduledSecondaryUpdate = true
IconBorder = {
}
ExtendedOverlay2 = {
}
hasItem = true
icon = ContainerFrame1Item1IconTexture {
}
NewItemTexture = {
}
JunkIcon = {
}
QuestBorder = ContainerFrame1Item1IconQuestTexture {
}
ExtendedOverlay = {
}
Border = {
}
Flash = {
}
timeSinceUpgradeCheck = 0
UpgradeIcon = {
}
flashAnim = {
}
readable = false
Count = ContainerFrame1Item1Count {
}
BagStaticBottom = {
}
ExtendedSlot = {
}
searchOverlay = ContainerFrame1Item1SearchOverlay {
}
Cooldown = ContainerFrame1Item1Cooldown {
}
SplitStack = defined @interface\FrameXML\ContainerFrame.lua:1046
}
bag = 0
slot = 1
tab = 1
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field 'Cache' (a nil value)"
ScheduleItemUpdate = defined @interface\AddOns\CaerdonWardrobeBagnon\Core.Bagnon.lua:18