Unable to find synchronise button to copy content from Staging to Prod

Hi Wendy! Hope you are well.

I’m trying to “synchronise” from Staging to Production but unable to find that button under the Prod’s setting screen. I find an export/import button instead. Have you tried that and if so Will all the documents and their linking relationship preserved? We are due to go live this week and I’ve planned to use the synchronise feature to save time for go live. I hope to hear from you. Thanks so much!

PJC.