Thank you for reaching out to the Community. Creating a job card in QuickBooks Online is currently unavailable. I know the importance of having this kind of feature. I'll make sure to tap this to our developer's team. This way, they might be given a chance to be included in the next product updates.
In the meantime, you may consider utilizing a third-party app that integrates with QuickBooks Online.
You can visit the QuickBooks Blog site, from time to time to see new updates. From there, you can see the future developments and the latest news about QuickBooks and what our Product Care Team is working on.
Don't hesitate to leave another reply if you need help with anything else. Have a good day.