You just answered a rant about too much ceremony by linking to an entire service that costs a staggering USD 400 / month. That’s the cost of an FTE in like half the world… to issue what are essentially “fat passwords”.
Imagine with a straight face trying to sell someone a “password generator service” when in reality that’s just a one line script snippet.
The disconnect between the physical reality on the ground and how it is treated by industry is just absurd.
But At least GCP and AWS have certificate authority products which essentially do work the way you want them to:
https://cloud.google.com/certificate-authority-service https://aws.amazon.com/private-ca/
Azure may well have one too, I just don't use their service.