Confused when reading a specific verse, could be mistranslated. any arabic speakers?

in the quran 7 157, its translated that >“˹They are˺ the ones who follow the Messenger, the unlettered Prophet, whose description they find in their Torah and the Gospel." What does this mean? cause it appears from the words used in the translation that its talking in present tense but the tawrat and injeel didnt even exist at that point it was corrupted, so is the verse actually talking about when each of these books were around?