The Krunker client is required to play a ranked game.
When in Krunker, press the FACEIT logo in the top left corner, or the button in the centre of the lower middle bar marked 'Ranked'.
From this page, you can enter the queue to find a match. Press 'Find match' at the bottom left corner to join the queue.
Please wait for FACEIT to find you a match, join the server and have fun!