When done well, deadlifts are an awesome option for strengthening the lower back. I always say that they can either destroy your back or bulletproof it… The key is in the execution. Outside of that, I’m a huge fan of reverse hypers, back extensions (done to parallel, none of that huge arch trash), and 45-degree back extensions. RDLs are another good option, and glute exercises like hip thrusts are also going to help in that regard. I’m not a huge fan of good mornings - not because they’re an inherently bad exercise, but again, because the risk-reward isn’t all that great. If you do them front-loaded in a zercher position, I like that.
Another piece of the puzzle is core stability which can be done with anti-exercises (anti-extension, anti-rotation, and anti-lateral flexion) to resist excess movement at the lumbar spine. There have been a ton of good articles by a number of guys who go into detail on that.