Hi Dan_dallion,
It looks like you're trying to save a Note as a PDF file. Thanks for reaching out about saving this file. We can help with this.
Only documents that you scan within the Notes app can be sent as a PDF. Other photos that are added are not included as part of that PDF. You can read more about scanning documents here: How to scan documents on your iPhone, iPad, or iPod touch
If you're looking to create a PDF document from photos saved on your phone, you can also create a Pages document, then convert the document to a PDF:
Pages User Guide for iPhone
Convert Pages documents to PDF, Microsoft Word, and more
Hope this helps.
Take Care.