Open work permit申請係無需job offer。但因疫情關係，open work permit approved後，現階段入境需要提供job offer。呢個只係暫時措施直至covid後加拿大重新開放邊境。 （原因係配合加拿大政府禁止non-essential travel，積極減低covid cases）
請參考以下link https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/permit/open-work-permit-hong-kong-recent-graduates.html
OWP will be just as long as your passport is valid. So it is on your best interest to have a passport with at least 3 year validity before you apply.