There’s not yet a universal calibration application so each BCI system is calibrated for each patient. Furthermore, yes, sometimes recalibration is necessary if the intended outcomes are bit off from what was expected.

Right now I think the go to company is Blackrock Microsystems, I think they have the most implanted BCI systems in humans patients out of all the companies. It’s weird how neuralink gets all the sensationalism when they’re quite far behind from Blackrock and other companies.