Nokia 6.1 Plus does support NFC(Near Field Communication) to share content with other NFC enabled devices but not wireless charging.
You can see detailed specs here: Nokia 6.1 Plus
Watch the review here:
Yes, Nokia 6.1 Plus supports OTG. USB OTG or USB On-The-Go is one of the most recent technologies that allows you to connect your pen drives and in some cases hard disks to your smartphones and tablets. It has a cable and through that cable, you can directly view and use your pen drive in your smartphones.
You can find the specs of Nokia 6.1 Plus here: Nokia 6.1Plus
Yes, the Nokia 6.1 Plus has the Hybrid SIM Slot.
A Hybrid SIM Slot is one which can have the SIM as well as microSD card. So, you can put either two SIMs or one SIM and one microSD card and use your phone.
Check Full Device Specifications Nokia 6.1 Plus