Focal length is a property of the lens, not the sensor. The 35mm on your camera will appear as a 52.5mm lens (35 x 1.5) would on a full frame camera.
The thing that makes it a crop lens is the smaller image circle projected out the back to cover a smaller crop sensor. It allows the whole design to be smaller in size and weight than a lens made for full frame. But it’s the same 35mm’s as any other 35mm lens whether designed for full frame, crop, 4/3rds, or medium format.
I think you need to adjust your expectations and be happy with your baby as they were on that day. That’s what memories are made of. Share the pictures and remember how, “You were so excited to be there and just taking it all in!” Why fake it for an aesthetic? That such a social media thing to do.