Hi guys, I recently try to run sly on the ps now but some glitch doesn't work anymore on it, if someone have an answer it would be great

PS Now has the same glitches as The PSN/Collection releases so if I were you, I'd watch a run done on PSN and learn from that. (Because some PS2 glitches were fixed.) Also I'm unsure if World 4 skip works on PSN (I believe it does)

PS Now (and PS3 remaster) has these glitches patched (but not limited to):
Cinematic Skips
A Stealthy Approach Sign Proxy
A Stealthy Approach Periscope Proxy
A Rocky Start Dog Proxy (very inconsistent but still works)
Loading to skip (most) binocucom cutscenes
Muggshot Catapult (have to do a new skip setup)
Loading before collecting keys/defeating bosses
A Dread Swamp Path Van Proxy
Fish Skip
A Perilous Ascent proxies
True APA lomaykay (can be done with charm)

If you do want to do these, i highly recommend looking out for a PS2 (NTSC/USA) version. The PSN version loses about 6:50, and even more on PS Now.