Visitor Visa expiry date for parent without stamping at airport

[mythdot]

My mother, an Indian citizen arrived from the US to Canada in June 2022 with a multiple entry visitor visa. Her passport was not stamped at the airport. I am trying to find out how long her visa is valid. Any help would be appreciated.

 

[nmatter]

My mother, an Indian citizen arrived from the US to Canada in June 2022 with a multiple entry visitor visa. Her passport was not stamped at the airport. I am trying to find out how long her visa is valid. Any help would be appreciated.

https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=442&top=16

06 Months as per rule , I also landed on 25th June and no stamp (this is my 3rd visit and every time no stamp)

but in my case I left after 15 days