Why can't I cast to level blueprint?

2022 here, with UE4.27.
So how can I access (Cast to > read) a variable in my Level blueprint???

I have a HUD that displays the Level number (and later I want to display the Long name (title) in a save slot). This is a level specific variable, thus I want only Level 1 to give me a value I can read as Level 1. Level 2, gives me 2…

So where can I set this level specific info, to Cast to in my HUD code > to then set/display as text on my HUD???
[I don’t want my HUD or Character BP to be a dumping ground of every variable I need in my game, when these are level specific variables.] Ty