Answer
For most shoppers, yes. If someone is asking specifically for “indica for sleep,” your team is on solid ground recommending Indica-dominant strains over Sativa or most Hybrids. The heavier body load, slower headspace, and tension relief line up well with nighttime and pre-bed routines.
That said, it is smart to avoid medical promises. Effects vary by person, tolerance, and setting. The safest framing is: Indica strains are what most customers choose when they want help unwinding, getting comfortable, and easing into rest, while racier Sativas are more likely to keep them alert.