Close Stance Low Box SSB Squat
Also, strengthen the core, ie Farmers Walks, Suitcase Carries, Zercher Hold, Zercher Carries.
Strengthen the glutes & hamstrings
Train the Deadlift from floor for speed/technique most of the time, it shouldnt be too draining at 40-60% plus maybe a bit of band tension for 6-8 sets of 1.
This is pretty much the Westside/Conjugate approach, although I’m sure most of you are familiar with it, and also know that there is more to it than exercise selection.
To answer your question, the exercises above with strengthening the right muscles to support you should help your deadlift. Sled Drags aren’t bad either, and as already mentioned, heavy KB Swings.
If in doubt, read up in detail on Westside Barbell. Probably one of the most tried and true methods that builds the main lifts without constantly hammering the mainlifts. If programmed well, it doesn’t cause as much neural fatigue even with the Max Effort work.