So there has been some new developments regarding Taiwan's military modernization program:
The Taiwanese Navy has formally purchased 32 sets of Harpoon Coastal Defense Systems, total cost NTD$ 39075606478. While only 32 sets of said system are currently purchased, the Biden Admin is seeking to sell 100 sets of HCSD systems to Taiwan. Meanwhile the Taiwanese Navy is estimated to have all 32 HCDS (and an estimated 128 Harpoon missiles) systems in service by 2025. Whether the Taiwanese Navy will purchase all 100 systems is still unconfirmed (but its very likely it still will) due to a raise in cost. If all 100 systems are purchased then the Taiwanese Navy will have an additional combat-ready 400 mobile Harpoon missiles deployed all around Taiwan's coast.
The Taiwanese Army has also formally purchased an undisclosed amount of HIMARS systems, total cost NTD$9622666593.
Data acquired from reliable sources of Taiwanese media. I've checked quite a lot of sources so I'm not gonna post them here.