I believe that you are missing the flow record command.

In flexible netflow you need to have 3 things, a flow exporter, a flow record, and a flow monitor.

In your config I see the flow exporter and the flow monitor, but no flow record.

Was the flow record configured previously and that's why its not in your template?

Here is an example of a flow record:

flow record standard

match ipv4 tos

match ipv4 protocol

match ipv4 source address

match ipv4 destination address

match transport source-port

match transport destination-port

match interface input

collect transport tcp flags

collect interface output

collect counter bytes

collect counter packets

collect timestamp sys-uptime first

collect timestamp sys-uptime last