I doubt its plagiarism. They probably own the tech/ip or bought for cheap. Anything is possible, I guess.
That is interesting though. While playing through the tutorial I was wondering how they managed to fund & create such a complex piece of software for the tiny h-games market.
I'm a sucker for sim games (excluding mobile pvp shovelware), but this just seems... a bit too much. Timers on everything. Lots of P2W red flags everywhere. Tutorial ramp-up was not great either. It just dumps you in to a hundred menus at once with no detailed explanations. It's a shame... since the game engine seems pretty crisp and nice to work in.