@suebseab I had heard that weight loss surgery can cause some other issues, and you are proving the point. That was good of your primary care to step up and help you.

Here is a website I found that you may or may not have seen yet for low oxalate diets: https://www.healthline.com/nutrition/low-oxalate-diet#foods-to-eat-and-avoid If I am repeating what you found out, my apologies!
Ginger