Welcome to the forum. What has been the total elapsed time since you paid for the HAs, and presumably Costco ordered them the same day?
In my U.S.A. Costco the turn around is supposedly <10 biz days as they are happy to make the 2nd appt two weeks after the first one. Thus by our “standards” it already being at least 2 weeks for you this seems a bit long for you in Toronto.
While you will benefit from cultivating a good relationship with Costco hearing dept. and the team there, doing a bit of polite nagging would not be unreasonable. With the delay, you should look at re-scheduling any follow up visit which is when tweaking of the initial settings that were done at appt in which you receive the aids. This 3rd visit might typically happen 2-3 weeks after the 2nd one (which has not yet happened for you). The 3rd visit can be done remotely if you prefer and is a good way to reduce potential covid exposure.
Since I am soon to have my own 2nd Costco appt to get fitted with my new aids, your post will prompt me to contact them as my HAs should be back to them today or Monday.
You might also want to read the owner’s manual; download the app for any smartphone; read here on forum about adjusting to HAs as a first time user; and pursue other hearing aid self education that will support you in optimizing your experience once you have the hardware on your ears.