The VNS can help stop seizures but also there's a sortof long-term effect from just having it firing every few minutes all the time, seems to re-train the brain in some way. I'm not sure if they really know how it works, just that it seems to help.
Another non-medication treatment that was very good for us was the ketogenic diet. Like, hardcore proper ketogenic diet, 4:1 ratio, prescribed and monitored by an NHS dietician. Every meal measured out by the gram. Its hard work but it did work very well. Its been properly researched - https://pubmed.ncbi.nlm.nih.gov/16146451/ https://pubmed.ncbi.nlm.nih.gov/25524846/ - for Dravet syndrome at least, keto is as effective as the best AEDs with fewer side effects.
But now after some time has passed I no longer believe it makes sense to do that, until these benefits for non-epileptic people have actually been demonstrated. It's not an easy diet to follow and if you follow it to the degree required for epilepsy therapy, you're restricting your protein quite a bit.
It seems that stimulating the vagus nerve resets something to default in the brainstem when a cascade event is about to occur - probably shuts down the errant signals from propagating to the entire brain ???.
Do you know which lobe in her brain it happens ??? (my daughter has left temporal lobe)