Was the PS pump buzzing when low on fluid? Is it buzzing now?

Generally, it takes thousands of low fluid miles to do any real damage, and even then, it will just get noisy rather than lose much output pressure. The first signs of real damage would be buzzing / hard steering when the engine is idling and car stopped. This is because the pump is capable of less volume at idle but the steering gear needs more pressure.

If you were driving without any fluid pre repair, the steering would be stiff when stopped and heavy while rolling.

The system probably has lots of air in it from the hose change giving assist , no assist. There are all sorts of brand specific procedures but the easiest one is to drive car, let sit for a few hours or more for bubbles to rise to the top then drive again. In other words, drive it a few days, check fluid once in a while and report back.