Convert word format file to pdf by automator

You do not need Automator to do this, and I do not believe Automator can even do it. My understanding is that MS dropped support for Automator back in the Office Mac 2016 days.

Here are two ways to convert Word docs to PDF:

1. In Word, just print the document to PDF. Do File > Print, then in the lower left corner of the Print Dialog, select PDF > Save as PDF.
2. Use Adobe's free Convert Word to PDF service.

Skip Automator.

1. MS Word can Save as… : PDF
2. LibreOffice Writer can export Word .docx as PDF both in the File menu interface and from the command-line

/Applications/LibreOffice.app/Contents/MacOS/soffice --headless --convert-to pdf:"writer_pdf_Export" foo.docx

or to PDF/A-3b (Tested: Sonoma 14.0 and LO 7.6.2):

/Applications/LibreOffice.app/Contents/MacOS/soffice --headless --convert-to 'pdf:draw_pdf_Export:{"SelectPdfVersion":{"type":"long", "value":3}}' foo.docx

Just print it to a .pdf:

Do a print, and then click the PDF button.