The first question is whether an aftermarket supplier offers larger rings to match your crank, or your budget for a replacement (and the related BB if necessary).

As to FD capacity, there are two basic issues, height and curvature. If you raise the FD (assuming there's room) for a larger chainring, the bottom of the cage may now be too high for the 22t granny.

Then there's curvature. FDs made for smaller rings have smaller radius curves in the cage. So they don't follow the curve of the ring properly and the effect is the same as wearing a hat that's too small. They touch first on the heel and have to be kept high at the center.

So, if you can find a ring, then it's a question of trying and seeing what you see. If it work, all is good. If you can't set the height properly, it's an FD too.

I suspect, that you could probably fudge it up to 46t, but probably not 48.