I know that but the past data (here) shows around 12-13 days. Thats why I am asking here.It takes up to 20 business days to receive new SIN, so you may not hear anything back until early February.
"If you apply for a SIN online or by mail and your application meets the requirements, you will receive a letter with your SIN by mail within 20 business days from the date the application is received. If more than 25 business days have passed and you would like to find out the status of your application, contact the SIN program. "
From: https://www.canada.ca/en/employment-social-development/services/sin/apply.html