You can supplement your Anzu's diet with egg food as this is highly nutritious and will be helpful in terms of replenishing the energy levels lost during the moult and will also promote healthy feather growth. You can add flax seeds and Niger seeds to the egg food as these are also good for moulting budgies.
To help with the general discomfort and itch from the moult, you can offer Anzu a shallow dish of water in case he wants to bathe.
If he likes likes, another alternative is to place a dripping wet leafy green. Some budgies prefer to bathe on their veggies and eat them in the process. Depending on his preference, you can also gently mist him with a spray bottle.
This is also a good time to put a budgie first aid kit together, if you haven't already. If Anzu is just starting a molt he is going to have some blood feathers for the next while. If you're not sure what that means check out this article that outlines the first aid measures you should be familiar with just in case your budgie has an accident and breaks one of them.
In classical mythology Apollo is god of the sky, truth, music, and healing,
and is defender of flocks.