Easiest way is to look at the printer's properties. There is a field called "Use". This usually states the name of the printer. If it states something like Generic PCL or Postscript, you might not be using the "Canon Driver".
If you are in doubt or unclear what you installed, visit the support portal for the pro-100. Remove the printer and re-install using the Canon driver.
Bay Area - CA
~R5 C (18.104.22.168) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw ~Pixel 8 ~CarePaks Are Worth It
Along with Rick’s response, if you see 3.0 as the driver it’s Apple AirPrint. You want something like 16.70.00; (I’m away from my MacBook).
When you remove the 3.0 version select the “+” button to add a printer and wait possibly a few minutes for the IJ Series version to appear.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.