The goal of this design of Falcon 9 is to handle 10 flights with minimum refurbishment. Right now, it looks like they're within a couple months of achieving that goal for the first time, with booster 1049 close as well, at 8 flights.
SpaceX is soon going to reach a point that they don't need to build more Falcon 9 boosters.
(It looks like they have very few customers anymore that insist on a new-build booster -- the fussiest had been the US government, but at this point, NASA is accepting reused boosters for human spaceflight, and the NRO has also accepted one for a mission last year. As far as I know, no one has publicly said they'd rather their booster has a test flight yet.)
https://spacenews.com/iridium-open-to-reused-falcon-9s-if-it...
If they can go significantly beyond 10, say 20, they have years of booster left if they want to.
I think they might only need to produce like 5ish or so more and that should mostly be fine until Starship destroys the market for the F9.