Will mortgage interest rates really rise in 2022? 

Yes, he said, knowing he has said "yes" for years and has been wrong over and over.  ;-)

To be fair, I guess interest rates did rise between 2012 and 2014 and again between 2016 and 2018. 

But, they've been below 5% for over a decade now -- and have been below 4% for eight of the past ten years.

So, again, will interest rates really rise in 2022?

After steadily declining since 2018, yes, it seems likely that interest rates will start rising again in 2022.

But, it seems quite likely that I could be wrong, again.  :-)