The request here is to be able to assign multiple people to one task.
I am aware that this topic has been discussed and closed before. I understand the argument about individual responsibility ("one throat to throttle"). In the days when Jira was a issue management system that worked well for scrum, this may have been valid. Nowadays Jira is sold as Jira Work Management and has multiple add-ons that try to do "real" project management where the underlying work is documented as Jira issues.
We have tried to follow this path but failed dismally. Our project is the implementation of a software package for a customer. Implementation includes configuring the software to the customer's business, uploading their data, training their users. We use a project management add-on called BigPicture.
The config tasks can be documented as Jira issues and managed in sprints. They are also visible in the project plan in BigPicture.
Other tasks such as training with 10 users, project review with steering committee, design workshop don't fit in Jira: multiple participants (assignees), no start/end date, no effort estimate. Some of these could be mitigated by custom fields but multiple assignees would be extremely difficult. BigPicture offer not support here because it assumes all "real work" tasks will be in Jira.
Maybe my question should be what kind of work does JWM aspire to manage. If the target scope is more than a scrum dev team, then there seem to be lots of essentials missing.
Sorry for the long post....thanks to anyone who read to the end :-)