Has your primary database (and repagent) been configured to send DDL?
To troubleshoot your issue we'll need a bit more info, starting with the complete output from the following stored proc invocations:
NOTE: Following assumes your PDS is ASE, otherwise we'll need the comparable data from a non-ASE PDS.
============ PDB (assuming PDS == ASE)
exec <db_name>..sp_reptostandby <db_name>
exec <db_name>..sp_config_rep_agent <db_name>
============ RSSD
exec rs_helpdbrep <dbrepdef_name>
============
If you happen to have your original 'create database replication definition ...' command, that may also be helpful.
