Studied abroad in Hong Kong about 6 years ago before the pandemic. If you can tolerate/don't mind challenging yourself on the language barrier (if you're not a native Cantonese speaker), the dai pai dongs are the best and most authentic experience. They are also rapidly folding so another good reason to go while you can. Recent NY Times coverage see below:
www[dot]nytimes[dot]com[slash]interactive[slash]2024[slash]09[slash]26[slash]magazine[slash]hong-kong-dai-pai-dong[dot]html