Is the iPhone 6 Plus still receiving the latest updates, it is now on 12.4.4?

Hello Blessing170,

Thanks for asking the Apple Support Communities about iOS 12 and security updates.

Yes, there are still updates being released for iOS 12. The most recent was iOS 12.4.4 released December 10th, 2019. About iOS 12 Updates - Apple Support

If interested, this article talks about the updates: Apple security updates - Apple Support

Thanks and have a wonderful day.

Alex forgot to mention that while the iPhone 5s, 6 and 6 Plus still recieve iOS 12 Security Patches, it does NOT recieve any version of iOS 13, because of an insufficient amount of RAM, which is the latest version of iOS since September 19, 2019.