Yeah modern reliability is a double edged sword. You get automotive like reliability and ease of ownership, but so many sensors and electronics that you just can’t diagnose yourself….unless you’re a tech geek.
Even if you are, sometimes there's not much you can do.
The triumph I have is a 2017 1200 thruxton. They are known to run quite lean. With aftermarket pipes, air filter and a cat delete (which many people do) they are really lean.
There is no simple way to have it tuned because the software is propriety and triumph won't/can't release it. EPA and all that.
Fortunately the ECU is able to compensate enough so that it's not dangerous for the engine but it would be happier if you could give it a little more fuel.