I find it hard to be a “battery prohibition era” when other threads before, in several years, have raised similar questions about shipping batteries to Canada…
Probably not only a problem of sellers, but internal rules of the country/airlines too.
I bought some batteries from an AliExpress store some weeks ago and they are on the way via PostNL.
However, as stated in another thread, there may be some shipping constraints of batteries and not only due to the reduced flux of flights.
Ex: I had some stuff from Convoy “delivered to the airline company” since the 7th April and it was only shipped on the 17th April.
Also, other constraints have emerged before with BG shipping batteries and other stuff not long ago: