Keeping this in consideration, is there an end to Wizards unite?
Niantic only provided the back end for the game. It's not their story or gameplay, they have no control.
One may also ask, why is Harry Potter Wizards unite not available? For some Android players, this could be because your phone isn't compatible with the game. Yes, sometimes the message is misleading and you'll see that it's “not available” just because your phone can't run the game. Heavy has a detailed story here about which phones are compatible and which are not.
Considering this, will Harry Potter Wizards unite cost money?
The game is free to play and is available on iOS and Android, which means pretty much anyone with a phone can play it. And like Pokemon Go, Niantic stands to make money off of in-game items that players can buy, which range in price from $1.69 to $34.99.
What is max level in Wizards unite?
According to the datamines investigated by Pandras96 on reddit, the Harry Potter Wizards Unite max level cap is level 60. This is different to Niantic's other games - for example, Pokemon Go max level cap of 40, while Ingress Prime allows players to Prestige and reset their progress back to the beginning once done.