A photo will not deleat from my message I sent

Hello Slackin,

Thanks for choosing the Apple Support Communities. If you are looking to delete a message, or an entire conversation, that can be down by following the steps below. Please keep in mind, if the message is already sent, and the time has passed that it can be undone, you will be deleting the message from your iPhone, but not their phone.

Delete messages on iPhone - Apple Support

"In the Messages app , you can delete messages and entire conversations from your device.

With Messages in iCloud, anything you delete from iPhone is also deleted from your other Apple devices where Messages in iCloud is turned on. See Use Messages in iCloud.

Note: Deleting messages changes only your own Messages conversations, not those of your recipients. To retract a message you sent accidentally, use undo send instead.

Delete a message

1. Touch and hold a message bubble, then tap More.
2. Select the message bubbles you want to delete, then tap ."

If sending to an iPhone and you're running iOS 16, you can unsend a message as well. Below is how to do that.

Unsend and edit messages on iPhone - Apple Support

We hope this helps.

Cheers!