I applied for Employer Job Offer: Foreign Worker Stream, it means it should be by paper.It depends on how you get your nomination. If you applied for OINP under a non-Express Entry stream (Job Offer for example), the application is by paper and it takes 15-19 months: https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/provincial-nominees/application-process.html
If you got the nomination under an Express Entry stream, then the applications is by EE
Thx