Maybe something unknown could be happening in settings?
A general understanding of how Airplane mode supposed to
work, states facts. However something else may occur that
might be to blame for added functions that should be OFF.
According to support articles and other similar sources online
from duckduckgo browser search in my Mac. (no A.I. assists)
https://duckduckgo.com/?q=how+can+i+set+iPhone+to+Airplane
+mode+and+get+text+messages&t=ftsa&ia=web
These also include video sources and non-Apple web page content.
Some suggest this 'airplane mode' was circumstantially "unreliable."
..My filters allow for an opposite response than your inquiry would..
And your traction here may vary by terrain, hardware, and direction.
A few examples include:
•How to send / receive iMessages in airplane mode - AppleToolBox
•Choose iPhone settings for travel - Apple Support
•How to use, turn on, and turn off Airplane Mode on an iPhone - Digital Citizen
•What Does Airplane Mode Do on the iPhone 14: A Comprehensive Guide
•Text Messages on Airplane Mode: How So? - Tech With Tech
(Generally the iPhone won't use Data if set on Airplane mode)
You may inquire direct from Apple support main site to try
addressing a specialist or get a chat (where available).
Contact Apple for support and service - Apple Support
//support.apple.com/en-us/106932
Offer Feedback to Apple is one-way ability
~ to offer ideas, or address an exact issue.
Feedback - Messages for iOS and iPadOS - Apple
//www.apple.com/feedback/messages-ios-ipados.html
Product Feedback - Apple
//www.apple.com/feedback/
