F1 does this. All teams are required to run the same, approved, ECU[1]. They can change certain mapping tables and such but it's a sealed unit and they can't replace the firmware.
[1]: https://wheelsports.co/formula-1s-standardised-ecu-explained...
[1]: https://wheelsports.co/formula-1s-standardised-ecu-explained...
At work we're a small team, providing a B2B application to perform a small, but very important task for our customers. We integrate with tons of other systems, at our largest customer we talk to 30 other systems. We're highly specialized and we rely on being good at exchanging data with other systems that are good at what they do.
This allows us to innovate and provide great value for our niche, while the other systems can focus on getting better at what they do, rather than implementing a half-assed solution because it's not their core focus.
[0] How the ECU is configured does, but the ECU itself doesn't
What F1 needs is disruption, more options, like too many options that all of them won't be test-able, less standardization. Even the limited sim time is a problem, because there are certainly optimizations left on the table that can't really be found otherwise. What you wind up with is a A-team and a B-team of mostly the same designs. That's booring, and moreso because if the cars really were 100% standardized, at very least it'd be competitive in terms of driver skill.
It's why these days, I don't watch much F1, I much prefer the more 'indie' racing leagues where, on any given raceday, anyone can win. The days of F1 being that way are long gone, and, it's not likely to change at-all.