Short-answer:
Within 5 days (1-5 days) as per the instructions on the onVue examination application.
Long answer:
I took the online examination from the comfort of my home on the 28th of March 2025 07:30 AST time, when clicked the exam finish button i got the message that claims "It takes 5 working days to process your exam results and check your adherence to rules, bla bla bla"
I actually received the exma results the second day, 29th March 2025 06:15 AST time (less than 24 Hours).
Thanks to the discussion here that gave me similar answer, i just wanted to post my answer as a recent examination date :D
Regarding the exam at a testing center, you got the result once you click finish.
Regarding the exam at your home, it takes from 1-5 days to procee your results (Actually i got the results < 24 hours)
Testing at home is a way better than testing at centers, you have fast internet speed, facilities (W/C, Water, Coffee, A/C, laptop/PC,..), quiet space with no interruptions (no other people examining in the same room)