You most likely know that NuWave is a stove top induction unit. It comes in two versions, the PIC2 and the pro version. The PIC2 is rated at 1300 watts and the Pro at 1800 watts. I have the Pro. ...
I doubt that the cooking ring diameter, 9.5" on the Pro, will be an issue. It has done well with 12' diameter pots. I know nothing about canning so can't offer any info on that particular cooking issue.
Years ago, my mother canned in a large pressure cooker. As I remember, the canning containers were surrounded with water. If that is true, the size of the Nuwave eye will not be an issue. There may be other issues that I'm not aware of.