One thing I don't see show up as a consideration in worldbuilding a lot is what things are professionalized.
By that I mean how (and whether) certain activities or focuses are conducted in an organized, professional manner or treated as a career path or industry (often with set standards or training involved) rather than those that are treated primarily as hobbies or conducted in an ad hoc manner.
Standing armies, for example, are professionalized in a way that temporary armies or militias aren't. Being in the military is a profession that is organized and has specific standards and training and that clearly distinguishes between people who are or are not in the military. If we look at a lot of past wars, though, as well as many militias, being in the military was not a career for most people (especially most enlisted) and the time and effort between deciding to join and being on a battlefield was significantly smaller.
A professionalized military will generally be a stronger, more cohesive, more effective military--but it is also far more expensive to maintain, because as it is a profession the military servicemembers pull their salary from the military on a regular basis, and it takes away hands from other tasks such as manufacturing and farming.
Over the last few hundred years a lot of countries have seen (to varying degrees) professionalization of fields like firefighting, policing, pharmacology, emergency response, and search and rescue. In these cases, it reflects 1) a recognized need for a standing trained force that can respond quickly; 2) a recognized need for standards and credentialing; 3) the ability societally to have individuals who might otherwise be contributing to manufacturing or food production not do that indefinitely; 4) a dedicated ongoing effort to maintain standards, trainings, etc.; and 5) organizations (generally governments) that can pay for these services.
We also see the professionalization of other things, like youth sports--the push to treat youth sports as either primarily a system to develop professional athletes or a career on its own.
When you're doing worldbuilding, consider what roles would be treated in this professionalized manner, rather than those that would be viewed as temporary positions or conducted on an ad hoc basis.
Is there a standing professional military? How does the professionalization differ between officers and enlisted?
Is emergency preparedness, response, or recovery a professionalized field? Is the focus of that profession on planning? On search and rescue, triage, or other immediate response activities or coordination? On rebuilding following disasters? On managing grants, tax relief, or other monetary aspects of rebuilding?
Is pharmacology a regulated industry that requires training or credentialing? Is medicine?
Is firefighting generally conducted by individuals in the neighborhood? By private industry? By unpaid volunteers managed by a governmental or non-governmental organization? By full-time paid staff?
Are these positions generally a full-time job or an ad hoc/as needed job that can be called on? If it is an ad hoc position, what are the credentialing requirements to be put on the roster?
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