The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
I would check out the membership dashboard to the virtual mobility coach section. Go to the workout section and mobilizations for the lunge archetype. The combination of the banded hip extension, bent knee quad mobilization, and basic glute mobilization will be a great combo to get you started. Try incorporating these into your routine and should be on your way to restoring that position. Here is a link to these mobilizations!