can an online signature field be added to a PDF

I want to have a field form PDF including a signature field to sign online. Is it possible to make one in Libre? The only information I can find is explaining how to sign a document, but not for creating a field.

Do these guides help?
https://help.libreoffice.org/7.3/en-GB/text/shared/guide/digital_signatures.html
https://help.libreoffice.org/7.3/en-GB/text/shared/01/addsignatureline.html

I am also having trouble :confused: