about synchronous_standby_names or sync replic

Hi Folks,

I wonder if it's possible to have a sync replication only from the the node
where the client
who update the DB and other node replicated asynchronously ?

example :
nodeCentral node1 node2 node3

user1  from node3 update db to nodeCentral (master) so nodeCentral
replicates synchronously node3 and later other nodes...

sorry if my question is irrelevant at this time ;)

Thanks

Franck

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