IRCC only check the entry and exit with US and do not check international flights. With regard to the confirmation emails that if you are in CANADA that you posted here, I have been asking from many people who are receiving CORP recently and they have not received any email nor call from an officer to check their status. Things have changed during the pandemic though.
You are correct, that was the case. However, it has now changed after Bill C 21 was passed and now travel information on all travellers is collected and stored by CBSA and shared with IRCC as per the MoU.
Background
The program’s purpose was to establish a coordinated Entry/Exit Information System to facilitate the exchange of travellers’ biographic information (such as their name and date of birth) collected upon entry at the common land border, so a record of entry into one country can be considered a record of exit from the other.
In addition to the exchange of data with the U.S. at the land border, regulations for the air mode came into force June 25, 2020, allowing the CBSA to begin collecting pre-departure exit information and exit records directly from commercial air carriers.
With the passing of Bill C 21, An Act to amend the Customs Act, data on all travellers (including Canadian and U. S. citizens) has begun to accumulate as of July 11, 2019 for travel by land. On June 25, 2020, the CBSA began collecting pre-departure exit information and exit records directly from commercial air carriers. From this date, commercial air carriers will have exactly 1 year to comply.
Collection and access to traveller data
The Customs Act currently allows the CBSA to collect land entry and exit data and air entry data on all travellers. Regulatory amendments for exits by air came into force in June 2020. Under the IRCC–CBSA MOU, information sharing between both departments for the administration and enforcement of IRPA is considered consistent use, as per paragraph 8(2)(a) of the Privacy Act.
Where entry and exit information has been deemed relevant to an IRCC officer’s decision in relation to a specific program (outlined in this document), access is granted by way of system user roles; only roles that allow a user to render a decision on an application in GCMS have access to the “Entry/Exit” tab.
See
https://www.canada.ca/en/immigration-refugees-citizenship/corporate/publications-manuals/operational-bulletins-manuals/service-delivery/entry-exit.html