No, an employer cannot force you to take any benefits in Canada. Under Canadian law, your employer is responsible for providing you with notice of any group benefit plan they may offer, but it is ultimately up to you to decide whether or not to participate.
When it comes to benefits, both you and your employer have rights and responsibilities. Generally, an employer can't legally require you to participate in a benefit plan or sign up for government-funded benefits, such as Employment Insurance (EI) or Canada Pension Plan (CPP).
On the other hand, as an employee, you are responsible for making sure that you are aware of any benefits offered by your employer. It's important to ask questions if you don't understand the details of a plan, or if you have any concerns about coverage or cost.
If an employer does force you to take a benefit plan against your will, you can file a complaint with Service Canada or the provincial or territorial government that oversees the plan. Your local labour standards office or employment standards office in your province or territory can provide more information about how to file a complaint.
You can find more information about benefits in Canada here: https://www.canada.ca/en/services/benefits.html
Hope this helps!