I am in a similar situation, as I have booked flights for friends with my Lifemiles, and ANA has cancelled the flight.
I will attempt to get the taxes/fees refunded, and the miles also.
Wondering though what expiration will apply to the refunded miles?
My current miles have an expiration date of Feb 28, 2021.
My refunded flights from late May had a June 2021 expiration date.