Great that you're exploring voluntary prayers! When I first looked into it, I also found conflicting info about Duha time in Lahore, especially since it starts after the sun has fully risen and ends before Dhuhr. The best way I found to track it is this site: https://namaz.day/nawafil/city/lahor — it gives you exact Nawafil prayer windows specific to Lahore, including Duha. Very helpful if you're trying to build a consistent routine.