Hi
Currently, the Form Designer feature is not supported in mobile device environments. Could you please confirm whether you are enabling desktop mode in the PDF Viewer and using the Form Designer feature there?
We have provided a sample below with set to true. Please review the sample and confirm if it meets your expectations. If the provided sample does not meet your requirements, please share a modified sample or code snippet to integrate the PDF Viewer, along with a screenshot or video for reference regarding the issues. This will help us analyze the situation further and provide a solution more quickly.
Sample:
Regards,
Priyadharshini