Jamf Pro doesn't support more than what Apple's Passcode payload provides in a Configuration Profile. The payload doesn't include the ability to set any sort of custom dictionary.
I wouldn't worry so much about passwords containing your company or user name as opposed to equaling your company or user name. You're only reducing the number of possible choices instead of making the password more difficult to crack.
Follow the NIST guidelines as listed here: https://securityboulevard.com/2019/03/nist-800-63-password-guidelines/
The basic rule of thumb for a stronger password is to make it longer not more complex. Require a minimum number of characters such as 12 or 16 and then encourage the use of pass phrases, which are easy to remember and quick to type.
Examples: mary had a little lamb or mary-had-a-little-lamb
Each of those is 23 characters long (and spaces do count as characters). Anyone can remember that in just a few seconds and anyone who's a touch-typist can quickly type that compared to something like r/R-2j1513Kx2T&w, which is only 16 characters, or Kg}?s8u3, which is only eight characters.
If you haven't read XKCD's classic complex password cartoon, it's worth a minute of your time: https://xkcd.com/936/
