You can do networking by getting on a server and opening ports, or your can do software defined networking via things like terraform or other solutions which includes defining lots of other stuff in a technology stack.
The platform tools answer the question of, how do you get the servers? how do you get the code on them? and how do you manage changes in those environments?
Devops CI/CD, SRE and the cloudy stuff all sort of fall into the bucket of platform tools and have jobs attached at the end of the day. Whilst it's not the most exciting work (to me at least) there's a lot of it out there.
