Stomach acid is also produced as reaction to food intake and other signals. Less acid => less reflux?
BTW probiotics have been found potentially effective by this systematic review: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019778/
This is probably not as simple as blaming the dysfunctional sphincter.
IMO early time restricted feeding shouldn’t be dismissed so quickly, it‘s potentially a fix for a number of systemic and gastric/enteric issues. The evidence is still weak but promising. The most important part here is „early“ - intermittent fasting usually has an eating window in the afternoon and maybe right until bed time. According to some (weak) studies, moving the eating window to the morning and early afternoon has vastly different effects.