You can't do all this alone; you need allies. So use your communication skills to persuade a suitable sponsor with the power to assign the necessary resources. Google and DX regularly release reports about these things; e.g., https://getdx.com/blog/documentation-culture-engineering/
You could use them to raise awareness in your organization.
Just once I'd like to see the burden put on decision makers to understand the needs of the business they run instead of having to make pretty decks they can pick over once a quarter when trying to figure out what line items to justify cutting to get a better bonus.