Single vs Married filing jointly

Not married yet, and curious about how MFJ works!! I make significantly more than my partner. Here's an arbitrary  scenario using the 2021 tax brackets:

 

Single:

Me:  falls into 32% tax bracket - earning170k

Partner: falls into 22% tax bracket - earning 50k

 

If we get married, our combine income will be 220k, so do we pay 24% in taxes per person? That would mean my partner will be paying more in taxes if we are MFJ...which seems wrong. Or is it something like this:

 

MFJ:

Me: falls into 22% tax bracket (instead of 32%) - earning170k

Partner: falls into the 12%  (instead of 22%) - earning 50k

 

Thank you!