Yeah, it's more of "unlicensed game" than "repro". I was thinking about this for a while, how the term "repro" is misused all the time, and even made a list in my head of all the types of games that get mislabeled. Here's the tier list, in order from Garbage to Gold:
"Counterfeits" - The maker does not own the rights and is attempting to pass it off as the real deal. Examples are any Pokemon game you can find on AliExpress.
"Bootleg" - The maker does not own the rights yet is selling you the product anyway. Examples are any rom hack or fan-translation on a cart.
"Repro" - The maker DOES own the rights, and created an imitation of a thing that already existed. The "reproduction" part is because they had to reproduce the means of creation from scratch, since the original factory and such have long closed. Examples of ACTUAL repros are ironically pretty rare, and are almost solely from limited-print companies, such as LRG releasing Zombies Ate My Neighbors on SNES.
"Unlicensed" - The maker owns the rights, but the platform holder (Nintendo, Sony, etc.) never approved of the game. Classic examples are the NES games from Wisdom Tree, Camerica, Tengen, etc. Current examples are stuff like lim-print company releases of stuff that were never finished/translated before. This is also where homebrew products go, assuming they don't use stolen assets. Though homebrew implies "one guy with a laptop and a tool shed", whereas unlicensed games imply an actual professional team with some kind of factory production and distribution line.
"Official" - The maker owns the right, the platform holder approved, and it got a normal retail release. Not much to say here. Examples can be found on all store shelves.
And finally, bonus category:
"Unreleased" - The maker owns the rights, the platform holder did (or would have) approved, but the game never got a normal retail release. Usually the game was basically ready to go, but got cancelled due to low sales forecasts, or the company simply went bankrupt. But somewhere in an office building or warehouse, these games WERE created, and they have now leaked out to the second-hand market. "Prototypes" also belong here, though their reason for being unreleased is simply "we made a better version the next week."