Hello TonyDaGreek,
Thanks for reaching out to us for support. It’s never fun when you’re not receiving notifications on your iPhone, and we are going to do everything we can to help you. When you have a free moment, can you please tell us when you first encountered this issue and if you have made any changes to the settings on your iPhone 6s? Also, can you please tell us all the troubleshooting steps you have taken so far in an attempt to resolve your issue so that we can avoid repeating them? When possible please be specific when describing the steps you’ve taken and the outcome after each step. Also, please tell us the version of iOS you are currently running on your iPhone 6s.
Find the software version on your iPhone, iPad, or iPod
Lastly, please give the steps in the following link a try. The reason we ask you to give the steps above a try is because they can potentially resolve your issue.
If you’re still experiencing the same problem after completing the steps above, please do not hesitate to reach back out to us so that we can continue troubleshooting with you.
Use notifications on your iPhone, iPad, and iPod touch
Thanks for using the Apple Support Communities.
Cheers!