Nintedo switch players were forced to upgrade to 1.19.63 today - none of the featured servers are on that version - so you can't play on a server - not only the featured servers - but you can't get to any external servers that you are whitelisted for either.
BDS-18116
Featured Servers "Outdated Server" Error
Resolved
Invalid
0
This is not a bug with the game. You will need to contact the server owners and ask them to add support for 1.19.63.