Based on what I have seen so far the battery life in iOS 13 is worse compared to the battery life in iOS 12. It seems to drain a lot during at night when I don't use the phone at all. I don't know why.
I usually switch off location and mobile data by default and switch them on only when is necessary. This way it lasts up to 2 days max with average screen time of 90 minutes or at the most 2 hours as a whole. I do not have any phone calls with that phone though. It is a company one and I use it mostly for emails and chats.
I would not expect it to last more than a day (it might be even less) if you use it for phone calls and have mobile data and location services switched on by default.