Long term TKR recovery

I’m 77 and 7 1/2 months postOp bilateral TKR. My one knee is good and the other has always had the tight band feeling and stiffness. I have acceptable flexion and the bad knee is about 5 degrees lacking full extension. I’m active and able to play golf and walk long distances. The tightness isn’t as noticeable when walking long distances. I also have stiffness and knee pain when standing up after sitting for a while.
Has anyone experience this at 7-8 months and had it resolve? Some say it might take a year or more.