All of them on July 31, 2016
http://www.jp.playstation.com/scej/online/bcjs30018.html
http://www.jp.playstation.com/scej/online/bcjs30058.html
http://www.jp.playstation.com/scej/online/pcjs50003.html
http://www.jp.playstation.com/scej/online/ucjs10107.html
http://www.jp.playstation.com/scej/online/vcjs10006.html
http://www.jp.playstation.com/scej/online/bcjs30095.html
No longer available after shutdown:
- Viewing and playing other users created stages
- Uploading created stages
- Online play
- Community functions
The PS5 Exists.