Most of our detailed timelines are in our signatures below. You need to login to be able to see signatures. A laptop is recommended. There are two links as well, in my signature below. Please take a look at them and update them.
1. Someone say it's usually 15-19 months after the file is delivered to IRCC. Is this true?
Ans: 100% true but also depends on lot of things. Goto
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/check-processing-times.html and choose economic immigration and then choose PNP. Mark Express Entry as no and see what happens.
2. Does my wife whether can apply her spouse work permit after I received the OINP nomination approval?
Ans: Assuming you are outside Canada - Whenever you apply for your employer specific work permit, your spouse auto qualifies for a open work permit. Nomination or not, this will be the case. Both can apply at the same time as one package.
3. Do I need provide the wages proof and job duty record to IRCC during applying the PR application?
Ans : Read the checklist and main page. there is a guide as well. Thoroughly go through that. Read all the sub-links and everything is well documented there.
Basically, you do not need IELTS, WES, proof of funds for this stream.
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/provincial-nominees/application-process/paper.html