I don’t have a definitive answer about the IETLS, but I can say that I also have an ITA with PNP and my immigration consultant told me to expect over a year (maybe a year and a half) for processing time due to the delays from the pandemic. Hope that helps.
I did some research - IELTS is locked after ITA so does not matter even if its expired. I checked on the official site for the processing time - its 6 month. Many people whom I know got between one month 10 days to 7 months. Never heard its taking a year. Thanks