Trek Central reporting that Star Trek Prodigy has been cancelled and will be removed from Paramount+ in coming days.

https://startrek.website/post/108995

Trek Central reporting that Star Trek Prodigy has been cancelled and will be removed from Paramount+ in coming days. - Star Trek: Website

Did it end on a cliffhanger and this means the ending is unresolved?
Sort of - the mystery of what happened to Chakotay is unresolved, but the crew got a more-or-less happy ending. From how it's being reported, season 2 is all but complete and they just need to find a new network or service to show it - I'd wager Prime Video might be a possible home for it as they've historically had distibution rights for the various other modern Trek shows internationally.
This gives some hope at least. This show is better than it had any right to be and deserves a proper ending.