Sneaky Finance Department! They posted the rates for the final rebate payment last Friday (November 14) at https://www.canada.ca/en/department-finance/programs/tax-policy/government-announces-2024-25-rates-final-payments-under-canada-carbon-rebate-small-businesses.html.
Looks like the final payments to the eight relevant provinces, for the April 1/24 to March 31/25 year, might be paid before the end of the year.