Please share which stretches helped you.
These may not be the same as the one suggested above, but when I fell back in early 2025, my lower back, discs, spine got wrecked. I was sent to Physical therapy and was giving exercises similar to these which helped me, may help you. Keep in mind that it is not a cure... https://www.youtube.com/watch?v=0wAw1-1MHa4
These are the ones: https://www.youtube.com/shorts/2gS8RYc9lus
"Frog Mobility" -- Get on hands and knees, spread knees but keep your feet closer together, rock back towards your heels and forward.
"Frog Cat/Cow" -- Same position as above, but tilt your pelvis; curve your back up then down.
"Tactical Frog" -- I haven't done this one yet, but it is frog mobility but with each rocking forward twist one of your feet up into the air; IOW rock back then as you rock forward keep one knee locked so that your calf/foot stays in the same relative position as you move forward.