Yes, the diameter increases by almost an inch, but ground clearance would increase by only half that, as indicated by the sidewall height increasing by 0.46 inches. That seems like a negligible increase in ground clearance to me, but I suppose it depends on each individual situation.

The Minimum Ground Clearance is about 4.5 in on the 2020 Honda Odyssey LX Auto, EX Auto, EX-L Auto, EX-L w/Navi/RES Auto, Touring Auto, Elite Auto trims. Here is a list of Min Ground Clearance of different trims:

The Honda Odyssey ground clearance is 4.5 inches across all model years. Check out the Ground Clearance specifications for other makes and models.

Lets compare the ground clearance of the minivans odyssey 4.5", sienna 6.5", Mazda 5.5", Chrysler 5.6", nissan 6.6". It is all about fuel economy... Lower the front end, remove the roof rack, more sculpted to minimize drag. As EPA keeps raising the mpg requirements, we'll see more and more of these changes.