I used to live in Richmond, fiber is new there (as in like last 2 years) and not available in most places in the bay area last I checked (although they could of did a massive roll out in past 2-3 years). When I lived in richmond only 2 options was available, AT&T U-Verse (dont even think this is a thing anymore) and Comcast (now xfinity) -- both were like 40 mbs max
I just checked my current address (north bay), it just became available apparently -- I checked after your post
but only offers 3 packages, 300 mb, 500 mb and 1 gb speeds -- which I believe is slower fiber than rest of country offering 5 gb speeds
I have 1 gb with xfinity cable right now, but it only goes up to like 400 mbs
edit: just ran speed test
294 down
234 up