This is your best bet. Developed by the same studio behind ETS2 (SCS Software), this PSP title offers:
Find the legitimate 18 Wheels of Steel - Extreme Trucker (USA).iso and load it into PPSSPP. euro truck simulator 2 ppsspp
Does a magical PSP version of SCS Software’s iconic simulator exist? Let’s hook up the trailer and take this rumor for a drive. This is your best bet
Since a direct PPSSPP version doesn't exist, players use these legitimate alternatives to get the ETS2 experience on Android or iOS: euro truck simulator 2 ppsspp
Did you find a fake ETS2 PSP rom? Warn others in the comments below!