mDNS already serves homelab.local style addresses.

Also, link local is almost always `fe80::` [0]. Today for privacy (and simplicity) reasons most devices pick a random address under that like `fe80::6923:83ab:201:273e`. But most operating systems allow configuring a static link address so if you really wanted you could use `fe80::403e:7ab` for something close to "homelab" (and `fe80::cafe` for your coffee maker) you absolutely can.

[0] The allocated range is fe80::/10 so fe(8|9|A|B)[0-F], but in practice it seems rare for devices today to use anything but fe80::.