I've dealt with this a ton trying to help troubleshoot people's home network problems during the early days of COVID WFH. [1] Some of the absolute messes I'd see were astounding, and they thought everything worked fine because all their phones and Apple TVs and kids PCs running Steam could all get to their cloud stuff fine, so why couldn't their company laptop talk to the printer they brought home and plugged into the "router" in the basement?

[1] Not something we'd /normally/ do, but when that was going on... You just had to get people working.