How does metamagic adept interact with flexible casting and the sorcery points cap?


You gain 2 sorcery points to spend on Metamagic (these points are added to any sorcery points you have from another source but can be used only on Metamagic). You regain all spent sorcery points when you finish a long rest.

Assume a level 3 variant human sorcerer has 3 sorcery points from their class and 2 from metamagic adept.

They spend 2 sorcery points from their class to make a 1rst level slot with flexible casting. Now they have 1 from their class and 2 from metamagic adept.

Are they able to convert a spell slot to sorcery points? Or can they not go over 3 sorcery points because they are level 3? In effect forcing them to spend the points from the feat before they can make more.

How does metamagic adept interact with flexible casting and the sorcery points cap?