Can the radix of someones nose be lowered/flattened?

Reduction of radix is very useful procedure to lower and shorten the nose visually. The extend of reduction may depend of dorsal height, forehead prominence, frontal sinus expansion and overall facial balance. In person consultation with a board certified plastic surgeon with expertise in rhinoplasty is recommended. Good luck.

Google "Roman statue face" for images to see a very high radix. The radix is made of bone, but can be lowered substantially in a rhinoplasty. It doesn't change how the rest of the bridge is handled: we do some morphs to make a plan, and then follow that plan during surgery.

Yes, we can lower the radix certainly. People with a high (sometimes called a "Roman") nose need this done, for example, for a more balanced look. It should not adversely impact the potential curve of the dorsum of the nose.