According to the OCRegister Disneyland has begun construction again. The main project mentioned is restarted work on a $200,000 renovation of the Frontierland entrance designed to improve traffic flow.
Construction has started again on the Frontierland bridge and other various construction projects around Disneyland and Disney California Adventure that needs to be finished prior to reopening the two parks.
Also worth noting Disney construction resumed work in early May on the Avengers Campus at Disney California Adventure and the Mickey and Minnie’s Runaway Railway ride in Mickey’s Toontown while the parks remained closed amid the COVID-19 pandemic.