https://www.canada.ca/en/immigration-refugees-citizenship/services/canadian-citizenship/act-changes/rules-2025.html

If you were born or adopted before December 15, 2025

Citizenship may have been restored or given to people who were born outside Canada in the second generation or later before December 15, 2025.

This means that in most cases you’re automatically a Canadian citizen if you were born

• before December 15, 2025
• outside Canada to a Canadian parent

This rule also applies to you if you were born to someone who became Canadian because of these rule changes.

If this change made you a Canadian automatically, but you don’t want to be one, you can apply to give up (renounce) your Canadian citizenship.

Adopted people are likely eligible to apply for Canadian citizenship through a direct grant for adopted people if they were born and adopted outside Canada in the second generation or later before December 15, 2025.

I’m not a lawyer, but I think it is worth investigating further from your end.

This is a straightforward case as long as you were adopted when your mother had citizenship status and the adoption took place before December 15, 2025.

Whether your mum was born in Canada or a Canadian citizen by descent, you’ll need go through a two-step process with some help from your mum.

Step 1 - Your mother’s citizenship status needs to be confirmed by IRCC. When this is done, an identifier will be created so you can complete step 2.

Step 2 - your adoption is documented so that IRCC can provide a grant of citizenship.

Here is the page with the forms - they haven’t all been updated yet to say that the first generation limit doesn’t apply to your parent.

https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/application-canadian-citizenship-adopted-person.html