Messages

Hi mazzi256,

welcome to the Apple (user-to-user) Community.

Re: "Y are all my messages sending as text messages"

Could be any one of various reasons ..

eg: have you tried restarting your iPhone (re-establish the wi-fi connection, delete temporary files etc),

or

(if you hadn't already) updating to iOS 16.5 (security updates, bug fixes etc)

and

are you sending to iPhones / Macs etc., or Android phones, or both.

Generally Messages sends iMessages over wi-fi (blue bubbles)

and

Messages sends SMS/MMS Text messages to Android phones using cellular data (green bubbles)..

or

Depending on your settings, if a wi-fi connection is not available, all messages may go via cellulat

Apple support have articles online that may be helpful:

What is the difference between iMessage and SMS/MMS? - Apple Support

What to do If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support

How to: Use cellular data on your iPhone or iPad - Apple Support

More Info: About Wi-Fi Assist - Apple Support

If needed:

Apple Messages Support

Messages for iPhone, iPad, Apple Watch and Mac — Official Apple Support

All the best :-)