The glass dilators were designed so you could wear them for longer periods of time, unlike the large sizes of the silicone dilators.
If you try to sleep with a large glass dilator, and it works out for you, then that is great.
Many women find sleeping with the larger sizes too uncomfortable, so they don’t do it.
But it is ok to try, if you feel like that is something you think would be helpful.
I do think daily dilating is key, and if sleeping with them helps you do that, then go for it.