Yes it does. The very difinition os whole life is level premiums. Anything else is not whole life. No matter what some sleazebag marketer at a given company tries to say or get away with.
What does whole life insurance mean
Guess I am a sleaze bag but I ain't no marketer . There is a whole life type that does not have a level premium. It is indetermintae premium whole life and has been around for years. AGLA was pushing their version of it (Master Life) just a few years ago. The initial premium was guaranteed for 5 years, After that it could go up or down but it could not exceed a maximum amount. It has a wiki page too
What is indeterminate premium life insurance