Fill and sign not available please help

Hi there,

I hope you're doing well! Thank you for reaching out.

It looks like the document has restrictions that prevent you from using the Fill & Sign feature. If you received this file from someone else, please ask them to check the document settings and remove any password protection or restrictions for Fill & Sign. Once they do that, they can share the updated file with you.

Additional source: For future reference and self-help you may also check the  help page https://helpx.adobe.com/acrobat/mobile-app-faq.html

Please try this and let us know if it works.