MySQL 8.4 replication issues

[Kallol Chakraborty]

Hi ,
I want to setup replication between 2 NDB Clusters V8,4 .
Primary Cluster
2 VMS are having data nodes and management nodes
2 VMs are having mysql API nodes

my.cnf:
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

log-error=/var/log/mysql/mysqld.log
pid-file=/var/lib/mysql/mysqld.pid
log-bin = /var/lib/mysql/mysql-bin.log
max-binlog-size = 500M
server-id = 2
port = 3306
ndbcluster
ndb-nodeid = 51
max_connections=10000
table_open_cache=2000
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
ndb-connectstring=****,****
binlog_expire_logs_seconds = 2592000
binlog-format=ROW
replicate-do-db=<db name>
binlog-do-db=<db name>

[client]
socket=/var/lib/mysql/mysql.sock

Secondary Cluster
1 vm containing data node, management node and API node.

my.cnf is same as above .

But while doing the replication, the bulk data replication is not happening properly , may be some of the data is getting replicated. While doing small data set, the replication is happening. Can anybody help us to know , what is the issue