While attempting to share any photos or files, there’s no keyboard option available.
For instance, when opening a PDF file and trying to share it through iMessage, you can’t find an option to type the contact details. Please rectify this issue.
iMessage unable to send photos or files
Welcome to the forum.
Your question is not about app development but product usage.
You should post your question on Apple Support Community: https://discussions.apple.com/welcome
or file a bug report.