主库(PDB1) --dg–> 备库(PDB1)
主库(PDB2) --dg–> 备库(PDB2)

主库是同一个数据库有不同的pdb，需要adg同步到备库（同一个数据库不同pdb）中，这种情况行吗？

可以支持。
备库设置不同的参数：enabled_pdbs_on_standby

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“*” on STANDBY1, then all nine PDBs will be created on STANDBY1.

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“PDB1*” on STANDBY1, then PDB1A, PDB1B, and PDB1C will be created on STANDBY1.

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“PDB*A” on STANDBY1, then PDB1A, PDB2A, and PDB3A will be created on STANDBY1.

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“PDB1*”, “-PDB*A” on STANDBY1, then PDB1B and PDB1C will be created on STANDBY1.

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“”, “-PDBA”, “-PDBB” on STANDBY1, then PDB1C, PDB2C and PDB3C will be created on STANDBY1. All other PDBs match “”, and the rightmost pattern has the higher precedence, so they are excluded on the standby.

• If STANDBY1 sets ENABLED_PDBS_ON_STANDBY=“”, “-PDBA”, “PDB2A” on STANDBY1, then PDB1A and PDB3A are excluded, but all other PDBs including PDB2A will be created.