I left a chicken I cooked on the counter for an hour sit for an hour then when I went to carve it I realized it wasn’t fully cooked

Having given myself food poisoning, I would definitely not eat that or try to finish cooking it. And get yourself an instant read thermometer. Here's an inexpensive one that works very well. https://www.thermoworks.com/thermopop/

What did you do then with the chicken - recook, put it in fridge, other?
What questions, if any, do you still have about what to do with it?
Have a look at this answer from USDA on similar situations.
https://ask.usda.gov/s/article/Is-it-safe-to-partially-cook-chicken-to-finish-cooking-later