If your Motorola G5 Plus doesn’t respond when you touch it then you need to reset it. I had this problem and that’s how i found this question. I tried doing everything i could at home like spamming the screen, knocking on it see if it answered, and i even tried to drop it again. All i had to do was hold the power button for a while or hold it then press it over and over but all i saw was that it reset and then i could touch my screen again.