Telegraf output.prometheus clinet not exposing data

Hi, I have configured telegraf input plugin top stream cisco grpc data and I can see the data if I stream it to the file output plugin in json format. So that part is working, but what I want is, to expose the data to prometheus and there is no data coming out at the endpoint for the output.prometheus client that would resemble anything like I get on the text file.
Is there another transformation that needs to be configured? if so where ? can this be done and am I even looking at the right output agent?

thanks