Water pressure?

Probably a bunch of smegma got flushed into your kitchen pipes.

The repairmen may have introduced debris in the line.

Some debris clogs the street valve and limits water to the house.

A pressure gauge can tell you your static pressure and your 'use' pressure. Both readings should be pretty close in number.

I would call the repair man who fixed the leaky main and ask them to fix their mess.

It worked BEFORE they 'fixed it', right?

Whenever there is a main break or service, they are supposed to flush the main (usually the nearest fire hydrant).

The faucet tip unscrews a mesh like screen.  This makes the foam.  It can get clogged.  Clean it and screw it in again and move on.

Clear the Clogs. Over time, your pipes can develop a buildup of mineral deposits.

Open Wide. The next solution requires little more than a few minutes of investigative work.

Replace the Regulator.

Look Out for Leaks.

the screen on the faucet, just where it enters the sink, is likely clogged.  It unscrews -- take it off, wash it, and replace it.  -- grampa

If cleaning the strainer doesn't work you may need to replace the cartridge. I had some crap get into a new kitchen faucet and no amount of cleaning back-blowing with compressed air replacing the cartridge would clean it out - fortunately I was able to return it for new one.

Unscrew the strainer on the end of the faucet and wash it out.  The water system was upset and some crud went to your kitchen faucet because you were using it. The crud plugged up the strainer.  Clean out your other strainers too.  They have crud in them, just not as much.

Remove the strainer screen from the faucet and clean it off.

Likely sediment clogged it up after the water was restored