Thanks for the comments. So far this is what I have found:
Plot/Print to PDF using Publisher in ArchiCAD 20. (On a Macbook Pro).
Print to Canon (from Mac) Acrobat Pro: collapsed text
Print to Fujixerox (from Mac) Acrobat Pro: collapsed text
Print to Sharp (from Mac) Acrobat Pro: everything ok
Print to Canon (from Mac) Preview: everything ok
Print to Fujixerox (from Mac) Preview: everything ok
Print to Fujixerox (from PC) Acrobat Reader: everything ok
Print to Canon (from PC) Acrobat Reader: everything ok
Thomas Allan Palmer
Architect AIBC MRAIC
ArchiCAD 24 MacBook Pro
Mac OS Catalina 10.15.6