Common settings for all users

Is it possible to set common settings for all users?
For my purposes I want to make changes in Load/Save|Gerneral (all users).

Maybe like this:

Perhaps some help in,silent%20and%20unattended%20installations,-Feature%20and%20Property

Yes, it is possible with a configuration extension.
See the LibreOffice conference 2023 talk’s slide deck at Using configuration extensions to automatic preferred defaults :: LibreOffice Conference 2023 :: pretalx

" Extensions are the preferred way for sysadmins to modify default settings. A guide for developing configuration extensions is available in PDF format. A sample OXT configuration extension accompanies the guide."