No service nodes cannot work asynchronously. Webhook node can work asynchronously. See an example -
https://test-discourse.kore.ai/t/example-of-how-to-use-web-hook-node-for-response-which-takes-more-than-20-seconds/989
No service nodes cannot work asynchronously. Webhook node can work asynchronously. See an example -
https://test-discourse.kore.ai/t/example-of-how-to-use-web-hook-node-for-response-which-takes-more-than-20-seconds/989