Wondering if anyone else has encountered this, and if so, what was the fix?

Our kitchen sink water pressure is very low - more than a trickle, a steady flow but maybe 1/2 or more of what it used to be (maybe a week to ten days ago). The water pressure at the regulator is 50 psi. The water pressure in the bath sink, shower and toilet appear to be about normal.

The only thing I can think of is the sink faucet. This is a 2020 2670MK, we purchased in Oregon. We have since completed a cross country trip and now reside on central Florida space coast.

Any thoughts?

Thanks!
Steve