I don't believe arbitrage still Exist in crypto world because it was before years currently the applications are made very strongly. I even know that in many exchanges the prices still vary but technically either they will not provide you withdrawal access nor they will provide deposit access. If Incase if you try you will get a notification as temporarily suspended.
To me its a waste to time and I still don't believe in this.
Arbitrage are real but when there are even the slight profit involved, there are active bots that uses the exchange API to trade and transact between exchanges tapping the opportunity before a human can manually do. This is how we get nearly the same price in every exchange. There could be manual chances in newer exchanges that don't provide API but we need to be extra careful with newer exchange as they could be scam.
Some causal scam advertisement involves unrealistic arbitrage opportunities that looks mostly real but one of the step is a scam where you lose all your money.