How to give access to specific group to move record from specific state to next specific state in existing flow?

We can do this by going to setting page of process ‘workflow management’ ->‘Workflow’. You need to search the specific state in ‘present state’ and ‘possible state’ columns which is already configured. Click on the icon beside delete icon, you will get the option to select the group in the pop up where you can select multiple groups and update it.

For more details, please visit our online help link Workflow