Look at the admissions requirements for the universities and programs of study you’re interested in.
Many Canadian universities calculate your admissions average based on Grade 12-level courses only. They want to see your grades for the relevant core courses (ie. English, Math, Calculus, Physics, Chemistry, Biology, History, French); some electives or non-academic courses don’t count towards the admissions average calculation.
Most students do not complete all their Grade 12-level courses in their senior year though; they may start taking senior-level courses in grade 10 or 11. If that’s the case for you, then it will depend on the university whether or not you need to submit additional information like SAT, AP or IB scores because you completed those admissions requirements in the US. You can call or email the admissions office to find out. However, if you will complete the required Grade 12 level courses in Canada, and you will have a Canadian high school diploma, then you’ll apply for university/other post-secondary program just like any other Canadian high school student.
If you’re applying to a university that wants to see grade 11 scores, you will need to check with their admissions people to find out exactly what you need to submit. Either way, most universities will want your transcripts from all years of high school.