Hi Turby06,
Thanks for contacting Apple Support Communities!
We understand that you're unable to consistently share content on your iPhone.
Are you sharing via apps to Messages or is the share sheet missing from Messages?
If you'd like to learn more about sharing content via Messages, this article will guide you: Send and receive content in Messages on iPhone - Apple Support
"Share content with others
To share photos and videos in the Messages app, paste a link into your message, or tap
to add photos and videos, then tap
.
To share content from another app (for example Podcasts, News, or Music), select the content you want to share, tap
, then choose Messages."
We look forward to your reply.
Cheers!