RMAN backup on RAC

Hi,

I have a 7-node Oracle19.9.0 RAC on Linux 7.9. I want to setup my RMAN backup in such a way that it runs on all 7 nodes and minimum 2 channels per node. So it will be minimum 14 channels in total.

This is how my RMAN script looks like :

ALLOCATE CHANNEL C01 TYPE SBT_TAPE connect 'sys@instance1' PARMS 'my_env_specific_parameter';

ALLOCATE CHANNEL C02 TYPE SBT_TAPE connect 'sys@instance1' PARMS 'my_env_specific_parameter';

...

ALLOCATE CHANNEL C13 TYPE SBT_TAPE connect 'sys@instance7' PARMS 'my_env_specific_parameter';

ALLOCATE CHANNEL C14 TYPE SBT_TAPE connect 'sys@