iMessage shows 'delivered' on Mac but not on iPhone

TL/DR I sent an Apple Message from my iPhone 16 Pro Max (iOS 18.5) to a friend who I am sure has not blocked me. It has no status on my iPhone, but my Apple Watch & MacBook messages show as “Delivered” - not sure if it delivered or not. For various reasons I do not want to resend or follow up unless I know for sure it did not deliver.

I received a “catching up” text from a friend earlier today. Now, the thing is, this friend recently, but inadvertently, hurt my feelings. I replied to their text mentioning that my feelings were a little hurt, but also reassuring them that I am still their friend and that I am still here.

The message does not show as delivered on my iPhone however, it does show as delivered on my other devices (Apple Watch, MacBook, etc…)

I am 99.9999% sure I am not blocked, we’ve had no beef and their message that I was replying to was a normal text from them warm, engaging, referencing future plans, etc.

Now, if my message was truly not delivered, then I would likely resend, however I would want to be sure that it truly was not received because if they did receive it and I resent it, it would make it seem like a bigger deal than it is. It literally was just something that was on my mind that I wanted them to know about that we could talk about the next time we saw each other.

How can I know if it was actually delivered?

[Re-Titled by Moderator]