I noticed that sometimes when you send an iMessage it still says iMessage in the text window. And other times it doesn't say that at all. Does it mean the recipients phone is off or does it mean you're blocked? What causes is the difference?
iPhone 11, iOS 15
Text messages are SMS messages through your carrier and only can be sent via cellular. iMessage is through Apple and can be sent through wifi or cellular.
See this article for more information on the difference: What is the difference between iMessage and SMS/MMS? - Apple Support
iMessage vs text
