Yes, in fact, several insurers now offer no exam life insurance for adults, including Haven Life, Fidelity Life, Sagicor Life and Globe Life, among others.
Since you are their parent, you have an insurable interest in your adult children, and you would be able to buy life insurance on them.
Keep in mind, most no exam life insurance policies cost more than you might pay for life insurance that does require a medical exam, because they may accept some who might not otherwise qualify for coverage.
In addition, each of the insurers offer different rates, amounts of coverage available without an exam, and requirements for approval.
Haven Life offers some of the more competitive rates on no exam life insurance coverage.
Here's how to get life insurance without a medical exam for your adult children.