I have no business asking this question since I am not a string scientist but I like to follow science news in phys.org and I read an article dated today Gravitational waves provide dose of reality about extra dimensions. This is based on the paper Limits on the number of spacetime dimensions from GW170817.
The article assuming I read it correctly which is a bit of a stretch on my part reports that at least in the "theory" referred to in the article the experimental evidence suggests no leakage is seen. They don't really say what the name of the theory is which is what prompted me to ask. But this was the first time someone was able to catch both the gravitational wave and the light wave from the same event.
Does this result also apply to the theories of string theory since they demand extra dimensions to exist ?
Sorry I worded the question a little differently in the title but I was haveing trouble making it fit.