Here’s some details on the bill. The Acadian Expulsion happened about 100 years before Canada became an independent country. So your ancestors would not have been Canadian citizens during the deportation. I am not an immigration lawyer though. There is a contact page on the immigration site, you could just ask them.

https://www.canada.ca/en/immigration-refugees-citizenship/news/2025/12/bill-c-3-an-act-to-amend-the-citizenship-act-2025-comes-into-effect.html

Fluoride can be bad for you, just at much higher doses than they put in water supply. It can cause issues with bones and neurological development. Again, only in very high doses over a long time. It happens a lot in poorer countries where they can’t treat well water.

https://en.m.wikipedia.org/wiki/Skeletal_fluorosis