They’re old Perry class frigates, so it’s cheap. They have budget issues.
We took the Mk 13 missile launchers off so they are only useful as an ASW platform.
While we did take the MK-13 launchers off, it doesn’t mean we scrapped them. There was one shipyard that had at least eight of them a couple years ago that could be refurbished and reinstalled. More than likely though, Taiwan would choose to install MK-41 VLS as the Aussies did in the FFG Upgrade Project or as the Turks did in their Genesis program.