Of course, you would have tried tapping the keys, so am wondering if there was any error message.
This archived article has some suggestions you might want to check:
If your MacBook Pro (Retina, 15-inch, Mid 2015) won't wake from sleep - Apple Support
First, check for these possibilities:
✽. Your display brightness might be turned down.
✽. If you're using an external display, your display might be turned off.
✽. Your Mac might be in Safe Sleep. To wake from Safe Sleep, connect your Mac to its power adapter and press the power button.
✽. Make sure that your Mac isn't turned off.
__________________________________
If your MacBook Pro still won't wake up, you might want to follow the steps to turn off Power Nap in the above article: