안녕하세요 OPT 라는것은 미국에서 F-1 졸업생들에게만 주어지는 개념입니다.
캐나다 대학 졸업자는 다른 이름으로 되어 있을 것이고 캐나다에서만 offer 하는 것입니다.

따라서, 미국학생들에게만 offer 하는 OPT 는 캐나다 졸업자에게는 대상이 되지 않으므로, 어떤 출처가 있으면 해당기업에 보여달라고 하시기 바랍니다.

참고 바랍니다.

What is OPT?
F-1 students who plan to work in the U.S. can apply for Optional Practical Training (OPT), a temporary employment authorization that provides an opportunity to apply knowledge gained in the classroom to a practical work experience off-campus.

OPT is a benefit of your F-1 visa status and not a separate work visa or visa category.
You continue to be in F-1 student visa status while you are on OPT and must abide by all F-1 regulations during your period of OPT.
Yale remains your visa sponsor. This is the last work authorization that will not need employer sponsorship until you have a Green Card.
Timing Considerations
Most students are eligible to apply for a total of 12 months of OPT at each higher degree level.
OPT can only be used once per higher degree level even if you have multiple degrees per level (e.g. OPT based on a Bachelor's degree and then OPT based on a Master's degree or PhD).
The 12 months of OPT must be used all at once, it cannot be broken up.
OPT must be used directly after graduation; it cannot be saved for later.
You cannot start work until you have received your EAD card and reached the start date on the card.
Eligibility
To be eligible for OPT, you must:

Maintain valid F-1 student status at the time of application
Be enrolled full-time for at least one full academic year in the U.S.
Be physically present in the U.S. when you submit your application
Intend to work or volunteer in a professional development opportunity directly related to the major field of study
Additional Considerations
You do not need to have a job in order to apply for OPT.
All work must directly relate to your field of study.
Students with degrees in Science, Technology, Engineering, or Mathematics (STEM) may be eligible for a 24-month extension to their 12 month post-completion OPT.
You do not need paid employment (volunteering is ok).
You can work on multiple opportunities at one time.