Many non-gravel rims are good for your weight, just check the manufacturer website. I think that is what you want to do, to me it sounds like the gravel-wide rims are going to be too wide for your bike.
I think "32c" is the max rated tire on that bike so I would not go wider than 21mm internal on the rims. 25mm rims can make the tire sit a lot wider, e.g. the 28-to-33 mentioned above. Of course it depends on where the close spots are, if it is the seat post the tire will not get any taller with a wide rim so there is no problem. But if it is the chain stay the 32c might rub there on a 25mm rim.
A 28c tire also could be problematic on a 25mm internal rim, both in terms of seating and in terms of potential rim damage due to the edges not being protected by tire.
So 32c tire could well be too wide and 28c could well be too small.. pinched on both sides, not sounding like good odds!