As usual, people who come to Canada for business must get a visitor visa or TRV. They must tell the Canadian government they are coming to Canada for business. When business travelers arrive at the border, they might have to show proof of their work to a person who works there.
You can stay for a maximum of 6 months on a UK business visa. You can request an extension of your visa if it’s been in effect for less than six months.
This will depend on the workload of the Embassy of Canada you have applied to. You may have to wait 1 to 6 weeks to process your Canada Business visa.