Estimates on how many League Challenge promo cards exist?

First of all: I’m completely new here and English isn’t my native language, so I’m sorry if my questions are unclear/stupid or have been asked many times in the past!

So I was wondering if there are estimates on how many copies of each League challenge promo card there are. More specifically the Tsareena 1st, 2nd, 3rd and 4th place promo’s (Reverse Holo Pokémon League Sun & Moon Season League Challenge). I know that the Pokémon Company is usually pretty secretive on how much copies of a specific card they printed, but for this one I thought it was maybe possible to come up with an estimate. As far as I’m aware, every League Challenge tournament top 4 player in each age category received this card, but I have no clue on how many age categories there were and how many of these tournaments have taken place in the Sun & Moon Season. Does someone have an idea on this? It would be cool to know!

Also, more in general: has somebody ever tried to come up with an overview of estimates on the number of copies of set cards? I know with the PSA pop report you can kinda have an idea on how rare a card is, but you really don’t know how many copies of that card were printed based on these reports. This stuff has always intrigued me!