When this story came out last month that is what was being reported, the 173 was all of the RWD cybertrucks sold.
However it only effects certain build dates:
Some reports have suggested that the recall number of 173 reveals a staggeringly low number of RWD Cybertrucks made, but Tucker says this isn’t the case. The recall applies to trucks built on certain dates using a specific shipment of lug nuts and grease, and cars with 18-inch wheels produced on certain dates. He says it’s a “subset of a subset” of Cybertrucks.
That’s not what that means
When this story came out last month that is what was being reported, the 173 was all of the RWD cybertrucks sold.
However it only effects certain build dates:
https://www.wired.com/story/the-latest-tesla-recall-wheels-may-fall-off-cybertrucks/
About 59,000 trucks across all models, in two years.
Which is about how many F-150s Ford sells in a month.