Thanks @santhosh_kumark. This was one of the posts I'd already referred to and it mentions the need for multiple participants for the ParticipantStepChooser interface. We decided to go with creating a temporary group (mentioned by bsloki) for the duration of the workflow. We opted against creating o...

The OOTB Dynamic participant step takes in a single user or group. It would be great if it can take in a list of users or groups. We have this as a business need. We've tackled it by creating a temporary group for the duration of the workflow that contains the dynamic list of users that will act as ...