Your battery is just fine and there is about a 50% drain over 12 hours in one screen shot and 16 hours in the other where at 19 hours it still showed 47%. You are seeing all day Battery Life when plugged in to charge every night. Even over the last week you have barely used over 50% of your battery in the last 2 days and far less for the previous week.
I see no need to use Low Power mode manually and the one screenshot that you showed without using Low Power mode showed very little difference in usage throughout the day. That is likely because the features that Low Power mode restricts may not be ones that you use regularly anyway. For example, iCloud Photos syncing, Automatic Downloads will have no effect if nothing is available, you may already have Background App Refresh turned off and Display Brightness reduced.
I agree that the one time you did have your battery drain to 1%, it was likely a one off where the phone did not make a connection to the charger for some reason.
Unfortunately you are in a location that is only able to achieve 1 bar for the cellular connection and this will use more battery power to maintain a connection at a distant cell tower, but there is not much you can really do about that and I don't even see that as a concern with your current usage graphs. The N1 chip in the iPhone 17 does feature faster network speeds and better 5g reliability, but I have not seen any comparisons in power usage of that chip compared to other models or its impact on power usage to achieve those faster speeds/reliability.
You will find it difficult to achieve Apple's claims of 33+ hours of video playback simply because those tests are performed in a controlled test environment that is going to differ from any real world test. There are many independent third party real world tests that have been performed on every model of the iPhone and the iPhone 17 Pro Max is consistently rated as the device able to achieve the longest run time ever, even across different platforms. CNET performed one a couple of months ago where the iPhone 17 Pro Max was #1 out of 35 devices currently available.
https://www.cnet.com/tech/mobile/best-phones-for-battery-life-we-tested/
Enjoy your new phone and use it like it is intended. Turn off Low Power mode and use Optimized Charging to charge your phone all night, every night. The standard you are looking to achieve is all day battery life and that seems to be what you have now.
