The way things are going currently, you can forget April 2025 even.
Timeline of first approval currently is 33 months. If your sister has accompanying family members (i.e. additional work permits or study permits) it could take longer.
After all this, there is a phase of back and forth with CIC. Where they ask for "update". The update could be anything from biometrics, police reports, medicals or simply a few questions on the job offer.
Overall a long 3+ years if she is outside Canada. From inside Canada it is around 12 months.