Even though it is a generic solution, they apparently use a slight modification in the recipe (not which components, but the amounts) on which the machines are calibrated. You could reproduce this, but it costs time and you need specialized equipment that only a few labs have. With this disclosure, labs can produce their own without that research.
There is an epidemic going on, and personnel have better things to do than optimizing a buffer to play nice with your thermocycler.
Any time there is a monopoly, prices have nothing to do with the cost of production and everything with what the market is going to bear, and no one but the monopolist benefits. And then the monopolist comes and wants to suborn the power monopoly of the government to sustain its profits. Come again, why should the European Union put the financial wellbeing of Roche above the health of Dutch citizens? We used to have antitrust, but nowadays even right-to-repair is controversial.
I am confused what the problem actually is.