How can I use Maps offline on iPhone 12 mini?

I also have an iPhone 12 mini and I downloaded some maps just today and then I turned on my airplane mode to check out how it worked u just use maps like u normally would but once I search for a place outside ur downloaded maps area u will need an Internet connection

hope this answers your question

In the article it does say “ Offline maps are only available in select areas “. You may not be in an area where offline maps is available.