I'm a bit surprised you didn't mention inflammation management. The western diet almost entirely consists of inflammatory foods - refrigerated dough, packaged snacks, burgers etc.
Whilst my tennis elbow is probably caused by poor ergononics and not warming up properly before exercising, I'm finding tiger milk mushroom, a known anti-inflammatory [1] is helping a great deal.
In my case I didn't find much impact from diet and any blood tests I did showed no signs of inflammation. Though as I mentioned closer to the end of the post, I think generally focussing on your health (and I'd include diet in this) is always good. Most things might not have an impact but something often will.
Whilst my tennis elbow is probably caused by poor ergononics and not warming up properly before exercising, I'm finding tiger milk mushroom, a known anti-inflammatory [1] is helping a great deal.
[1] https://www.nature.com/articles/s41598-021-91256-6