Not really relevant for an iPad, but it’s a good example:

Have you ever tried putting a custom ringtone on an iPhone?
In Android you just put an audio file in the ringtones folder, either by plugging it into a pc or with an on-device file manager.

For an iPhone you need to either buy the ringtone from the store or put it on the device through iTunes (🤮). Also it can’t be just any format. It needs to be a specific profile of AAC (if I remember correctly), then rename the file to have a specific extension. There is no way you could do all that without reading a guide.

It’s not just that characters make stupid decisions, the same characters keep making the same mistakes and nobody ever learns from those mistakes or grows as a character. It’s so extremely frustrating.

Since you specifically mentioned C# : https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions

I’d be surprised if there is a serious language that doesn’t come with at least some semi-official style guide. But usually they are not universally followed and everybody just does their own thing.