Hey Buddy, we all feel your feelings, everybody here loves their wives. You cannot apply for visit visa till may 18 unless it is extended.
Once the visit visa opens up, you need to prove that your wife will return to Pakistan within the 6 months of entering Canada. To prove, you would need to have property on her name, bank statement, or a letter from the employer saying she would go back to Pakistan to continue her job. I have seen most people booking a return ticket aswell.
Basically you need to show that she would exit Canada within 6 months.
Mostly people get rejected by saying your spouse doesnt have good ties with Pakistan. Un ko lagta hai hum wapis ni jai gy, or hum log jaty b ni hai.
Mai b Dec 2019 ka applicant ho, InshaAllah mai b apply karo ga visit visa. Lekin mujy lagta hai boht kam chances ho gy. Q k corona ki waja sy na kam acceptance ho gi. Baqi yar Allah behtar kary ga.