To apply to be Canadian, the applicant needs to apply for citizenship.
The requirements for applying for citizenship are:
People 55 years of age and over are exempt from language and citizenship test requirements.
After the applicant applied , they should wait for IRcc to cantact them for Citizenship test and after that final step to become a Canadian citizen is Taking the Oath of Citizenship at a citizenship ceremony.
There are numerous advantages to holding Canadian citizenship.
IRCC provides estimates of processing times on its website.
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/check-processing-times.html