Download the file using a HTTPCaller and process if from there.
I'm not sure if FME can extract from tar. I would try to solve this using Python. Or use a SystemCaller to do a 7-zip commandline.
do you have 7-zip commandline ? bcz after extract this pipeline will publish on flow
Just tested in FME 2022.2.5 - Just put the URL as the path to the dataset and it works:

virtualcitymatt wrote:
Just tested in FME 2022.2.5 - Just put the URL as the path to the dataset and it works:

Ah, I tried this in a FeatureReader in 2021.1 and it didn't, so wrong conclusion on my part.
nielsgerrits wrote:
Ah, I tried this in a FeatureReader in 2021.1 and it didn't, so wrong conclusion on my part.
And now I try again and it works as expected :| guess I just screwed up yesterday.