Implementing Save as Draft for Adaptive Forms for Anonymous Users

We have a requirement for an adaptive use case wherein we aim to enable the capability to save a form as a draft for anonymous users. For instance, if a user starts filling out a form but leaves it incomplete, and later reopens the same form on the same browser, they should find all the previously entered values prepopulated.

We intend to implement this use case using adaptive forms specifically for anonymous user journeys. Could someone please provide documentation and detailed steps for implementing this functionality?