Facing issue in pooling 2 machines to run on a single queue in Cloud

I am facing issues in adding 2 machines in a pool to execute on single queue in UiPath Cloud Orchestrator. I tried all possible solution uploaded in UiPath community but no luck.

Hi!

Set up a Trigger (either a queue or a time trigger) and then specify which machines is allowed to run the process associated with that queue.

Orchestrator - About triggers

See this thread also:
Trigger an unattended robot to a specific machine - Help / Studio - UiPath Community Forum