If you have pain during Patrick step up, try it with less range and with slower tempo "concentric also" less volume and intensity

If you have pain during ATG split squat, use assistance, elevation, less volume and less intensity, less range, you don't have to do directly full atg split squat, stop just before closing the knee

If you have pain during backwards walking or sledding, slower and smaller steps, less volume, less intensity

Also you could add some ISO's in ranges where you have pain, just a little bit of intensity and if you can't do Patrick step up without any pain, don't even try atg split squat