If it’s a network printer and it lists Postscript and/or PCL6 support on its specs it should be good for at least basic printing. I still use my Brother laser though, haven’t needed to replace it yet.
I wondered this a bit too and share your concerns. On one hand I like the idea of populating Lemmy with more content, particularly for niche communities, but there’s also a good amount of unique posts here that might get drowned out.
Brother laser printers are great. As long as you get one that supports Postscript (Brother calls this BR-Script), PCL5 or PCL6. You can see this under the “emulations” printing specs on a printer model page. PostScript and PCL both have fully open source implementations so you’ll usually be able to just use built-in CUPS gutenprint or foomatic drivers. I also recommend ethernet (wired or wireless) and not usb.
Do not get one that only says “GDI” emulations which is Windows based and can be really painful to deal with.