I don't know why Tetris Attack isn't in the SNES classic
The NoA back then really fucked up thinking Panel de Pon wouldn't sell in the west so they did the Yoshi pallette swap and used the Tetris licensed name.
Tetris Company regrets letting them name it that since they feel it's not Tetris.
There's no way NoA will ever get to bring it back if that's the way Tetris Company feels.
Too bad NoA won't put in the money to just localise Panel de Pon then, it's not an RPG with a thousand word script.