Just off the top of my head, things that aren't even universally seen by practitioners as good things, let alone things everyone does as a "minimal" baseline:
* On request, enable your customers or their delegates to test the security of your application
* Implement role-specific security training for your personnel that is relevant to their business function
* Comply with all industry security standards relevant to your business such as PCI DSS, HITRUST, ISO27001, and SSAE 18 --- LOL to this whole line item.
* Maintain an up-to-date diagram indicating how sensitive data reaches your systems and where it ends up being stored
There is then a longer list of controls that I think most practitioners would say are good things, but that aren't always P1-prioritized (for good reason, to make way for more important things). CSP headers, SLSA level 1 builds, media sanitization policies; these things are situationally important.
I think an opinionated checklist is a fine thing, but when you call something the "minimal viable" standard, you set yourself up to explain how lots of well-run companies are viable without these things.