How do we apply Infrastructure as Code to a physical environment?

I've been researching for this a few days and nothing comes to mind. I have an physical environment ( switches, firewall, access points, cloud servers - most of them microsoft solutions ) and i've been thinking if its possible to automate some of the trivial and day to day activities with scripts and such like backups of our devices. But is that it? Or there is more that we can do with coding to improve our physical infrastructure?

Im new to this world. so i dont know where to begin.

Thanks in advance