Took a careful look,
@CockroachDB
is indeed a #distributed_database: the data is replicated for #resilience, and #sharded for #scalabilty.

http://simplepgdba.blogspot.com/2023/09/checking-cockroach-distributed.html

And always more to discover...

Checking Cockroach : Distributed, Replicated, Sharded.

 TL;DR: Some simple testing of data in a table to see how it is "replicated" and "sharded". Spoiler: cockroachDB replicates from the start, ...