You effectively have the same crop modes as the Leica Q3 from 35mm FF equivalent - I suspect though that teh Fuji lens won't resolve quite as well as the Leica ('I suspect' is being conservative as the Leica Q3 lens out resolves my GF45mm for the GFX system!!!) - going back to the X100VI you should get around 6MP for a 90mm crop - without having to resort to a digital zoom.
This is the Leica with a 90mm crop from its native 28mm
240203 90mm Crop Outline by
David Yeoman, on Flickr
240203 90mm Crop by
David Yeoman, on Flickr
I would hope that you get similar with the X100VI but you would have to stand a little closer to reduce the native 28mm to the Fuji's 35mm (FF equivalents) - though this image was shot at F1.7
I'm pleased that you are enjoying the X100VI, please keep using it and taking images!
That will be true to a point, but you will get to a point where a cropped non digital zoomed image will be of better quality than the intepolated digital zoom image.