Depends on where you live. Since they were released, not counting my car, I've seen two TourXs, 8 Sportbacks, and zero GS. This includes going to the dealer to buy my TourX, where I didn't see any others.
However, those numbers are also deceiving. I had a one week trip to Michigan, which accounts for one TourX and one Sportback. I had a little over a week in Calgary/Banff, where I saw 5 Sportbacks. The TourX is not sold in Canada, and given Banff is a popular tourist destination, I suspect most, if not all, were rentals.
Outside of those, at home in So Cal, with an hour and a half spent commuting ~50 miles round trip between Orange County and LA County on weekdays, I have seen a single TourX and two Sportbacks.
When i started looking at the TourX in March, there were less than 80 for sale in a 100+ mile radius. The vast majority were leftover 2018s, so they just weren't selling. For reference, the single closest Toyota dealer has over 80 2019 Camrys in stock, and there are over 40 Toyota dealers in the same radius.