MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
{SHOW SLAVE HOSTS | SHOW REPLICAS}
Displays a list of replicas currently registered with the
source. From MySQL 8.0.22, SHOW SLAVE
HOSTS is deprecated and the alias
SHOW REPLICAS should be used
instead. The statement works in the same way as before, only the
terminology used for the statement and its output has changed.
Both versions of the statement update the same status variables
when used. Please see the documentation for
SHOW REPLICAS for a description
of the statement.