USCIS receipt update - Average days?

How many days on average does it take for Receipt number to be updated and the case status be available on call or website?

Currently, my number is not reflected on the site, and some internet materials seems to suggest a longer period, however is there any ‘normal’ or ‘average number of days’ by which it gets updated?

Thank you,

If you have a valid receipt number and it doesn’t show-up on the site, then employer needs to open a case w/ USCIS and get it fixed.