I suffer from this, linked with hiatus hernia. I’ve found it seems to improve if I’m eating low carb e.g. The BS diet. Things like bread, rice and potatoes set it off again. At the mo I’ve been winning by keeping the carbs low to about 30-50 grams per day.
I found this recently which interested me. It set out my experience very clearly.
https://proteinpower.com/drmike/2013/09/23/gerd-treat-low-high-carb-diet/#comment-997743
Now I’ve read the Clever Guts book I think I’m nearer a longer term solution as the two lots of info seem to work in the same direction.