Many people lock in interest rates for the life of the loan. Most often 30 years for mortgage loans. You don’t have to renew a mortgage’s interest rate unless you get an adjustable rate one.
This is the main reason why mortgage applications are down significantly right now. People with super low interest rates don’t want to move because they’d have to get a new loan to do so, and interest rates are much higher now. If they stay and they have a fixed-rate loan, nothing changes.