Need suggestions on GC process

I am on L1A. My employer is filing EB1. But at the same they have also asked me to file Canada WP. By any chance, will the canada visa will affect in approval of my I140 and I485 and Green Card approval?

No issues. Applying for Canadian WP do not impact US green card. In fact even applying for a PR with any other country do not impact your US PR application.