Just curious what the reason for the emulator ban is? As someone without a playstation of any generation, it becomes impossible to submit times for the game as is.
PCSX2 (or any other emu) has rather inconsistent performance between different systems, and for a game like this where the majority of competition is in the time trials where milliseconds are crucial, it's important that we set a standard so that everyone's on a level playing field and isn't advantaged or disadvantaged by lag and other performance oddities.
I wouldn't be discouraged from running the game though - leaderboards aren't the end-all-be-all when it comes to speedrunning. Right now we have a runner who's been playing solely on AetherSX2, a mobile emulator, and has been having fun improving their time despite not being able to submit. If you enjoy playing the game, I wouldn't worry about the leaderboards at all. People will end up recognising your skill regardless.