Percona XtraDB Cluster 8.0 - cluster size as 1 at node 2 and 3

MySQL & MariaDB Percona XtraDB Cluster 8.x
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2

In your configs you should have

wsrep_cluster_address = gcomm://192.168.0.1,192.168.0.2,192.168.0.3

on ALL your nodes, not only on Node 1

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