IRC doesn't provide any feedback on messaging. Messages are sent silently. However if you're quiet banned (mode #chan +b ~q:), you can still receive messages, such as the notification that the channel mode/ban has been applied, and you can still use channel commands, such as viewing the list of bans.
Ignoring a user is entirely client-side. You might be able to test it with a ctcp, depending how the client is designed and configured, and depending on their umodes (if ctcps are blocked) as ctcps are standard messages with a prefix.
Silencing is unlike Reddit shadow bans; firstly, it only applies to private messages, not to channels. Secondly, it has to be configured by the individual users, not by admins.
Ignoring a user is entirely client-side. You might be able to test it with a ctcp, depending how the client is designed and configured, and depending on their umodes (if ctcps are blocked) as ctcps are standard messages with a prefix.
Silencing is unlike Reddit shadow bans; firstly, it only applies to private messages, not to channels. Secondly, it has to be configured by the individual users, not by admins.