Yes. IRCC accepts both CELPIP and IELTS to verify the applicant’s English proficiency. While IELTS is one of the standardized tests of the English language, IELTS is not mandatory for Canada immigration.
IRCC accepts the CELPIP-G test for immigration and citizenship. The “CELPIP-G LS” test is only carried for Canadian citizenship purposes and not for migrate overseas to Canada.