Do keys. Easiest way to do keys is start low and work your way up.
Open the group finder in game and there is a tab on the bottom for M+ that will show you what you’ve completed and your best.
the point is to continually do keys higher than the previous.
It did. You did a freehold and completed it within a 2 chest timer. You can check raider.i o for your profile to see what your score is. It’s pretty low right now but you also haven’t done any Siege of Boralus, Temple of snakes or Kings rest. Just keep doing higher keys.
https://raider.io/characters/us/stormrage/Zaraxo
Wowhead has a lot of great guides for monk on mythic plus.
Here is one for Brewmaster. https://www.wowhead.com/brewmaster-monk-mythic-dungeon-guide
You need the raider. io addon and you need to update it daily to update the scores. usually low scores don’t pop up.