Hi Michael,
The Issue Tracking app in SharePoint Online is also a list. We can configure its columns in List Settings.
For example, we can let Due Date column always display the current date as default value. When we create a new item, the Due Date column will use the default value.
- Click the LIST tab>List Settings.
- Find and click the Due Date column in the Column section.
- In Default value section, choose Today’s Date.
- Click OK.
If anything is misunderstood, please share with us more details about “auto populate the date and time filed” (e.g. what date do you want to populate? Which column is it?). We appreciate it if you can capture some screenshots of the Issue Tacking app in your tenant. It can help us understand the requirement better.
Best regards,
Tim