Welcome to the forums and congrats on your new smoker.
If we have 1000 members on this forum there has to be at least 999 ways to make ribs based on people’s opinions.
My opinion is nothing is “wrong” if you enjoy it. More people than not think fall off the bone is the best there is. That’s ok. Your not entering a bbq comp.
So To answer your question you steam the ribs more in the foil with liquid. That’s the middle of the 3-2-1 method or the “2” part.
If I was you I’d invest in a good dual probe thermo as there is no way the thermo on your
masterbuilt is correct. Then you’ll know your true temp. That’s a big start. If your ribs were a bit tough your probably smoking at a lower temp than you think you are.
If you use the 3-2-1 method at 225 degrees and add a little more time to the “2” part you’ll get some fall off the bone ribs your looking for. And you can try adding more time to the foiled part, or less as you work through the learning curve and find out what kind of tenderness you like.
Good luck with your super bowl ribs!
Scott