I am applying for immigration to Canada now, and my husband is the main applicant. I want to go through the divorce formalities after the immigration is completed. Does it affect me?

Your husband is the main applicant, so you must follow your husband when you enter the country for the first time, and you can get the maple leaf card in about one month. After getting the maple leaf card, it will not affect the divorce. However, if you don't get a visa and don't land in Canada, you will lose your immigration status in Canada after divorce.