Please let us know if Republish from the publishing queue for Sites 9 work out of the box or do we need to install any extension if so how can we apply it for Sites 9.
welcome to tridion Stack exchange, you can refer to this link for more details tridion.stackexchange.com/questions/19199/…– Anand N S ♦Sep 3, 2020 at 14:35
we don't have this out of the box , if you need to apply the extension you can download from this link
2It is out of the box functionality for Sites 9.1 and higher, though. Sep 3, 2020 at 20:10