Apologies, I am not familiar with Canadian regulations. However, your unruly neighbor to the south has a common issue.
American sunscreen doesn’t work. European and East Asian (Korean/Japanese specifically) sunscreens use a perfectly safe chemical that has long lasting power and incredible UV protection.
This chemical has been in widespread use for decades in these markets with no statistically significant health issues.
This compound is not used in the US because sunscreen is considered a health product in the US and must be tested on animals before human use.
Consider importing some from specialty sites or find a local Asian beauty shop.