Network diagrams are just cope for not understanding your config. You spend hours making pretty boxes in draw.io, the colors, the arrows, and for what? When the server break at 3am you ssh in and grep like everyone else.
I run 40 containers on my personal hosting, no diagram, no problem. I know where every packet goes because I built it. Memory is faster than Confluence.
If you need picture to understand your own network, maybe you do not understand it, no?