You shouldn’t use .local for your manually defined local domain names if you plan to ever use mdns/avahi/bonjour/zeroconf.

There actually is a correct awnser: home.arpa
See https://www.ctrl.blog/entry/homenet-domain-name.html

*.internal.domain.name since ssl certs are easier to get when you’re using an owned domain name.

I use a subdomain of a domain name I own.

I use either .home or an actual domain that I own (makes it easy for https certs and not having to go out of the network and back in)

hostname.vlan.local.lan

local.lan is the only fixed part of my fqdn’s

server.home for my part

Idk is that wrong but I made up server name tride so .tride is my local domain

.home.lan for me.

I use different ones. Got an legit dpmain which I also use locally (with ssl certificates) and in my local network my server listens to SERVI. Just SERVI.