The PSVR2 PC Adapter sold out. So did the PS Portal. They don't sell PSVR Sense controllers separately.
Sony manufacturers more hardware than anyone else in the gaming industry. The idea that they can surge on specific items is unfounded.
Ignore the PlayStation consoles themselves and they're manufacturing controllers, headphones, earbudes, PSVR2, at a time they owned a company manufacturing storage drives, controller chargers, psvr2 controller chargers, and if you want to get into it further, inzone headsets, and monitors, console covers for 5 different models of PS5, disc drive attachments, vertical stands, PS Portal, pro controller, media remote, camera... and they're still making DS4s...