Looks like they have until Jan 1, 2023 to make it a reality. Copied/Pasted straight from the signed bill below.
"This bill would authorize the department, on or before January 1, 2023, to provide an option to display a sport fishing license, validation, report card, or other sport fishing entitlement issued pursuant to the Fish and Game Code or regulations adopted pursuant to this code electronically on a mobile device, except as provided." (Bill Text - AB-817 Sport fishing licenses: electronic display: 12-consecutive-month licenses. (ca.gov)).