I would love that option as well, however, Microsoft wants you to by MS Project.
I would recommend looking at Smartsheet instead.
You can add it as a tab to a MS Team (has the integration and it can be viewed as cards)
you get the best of both worlds.
if MS Project was not so expensive, I would use it too and planner is great for using it as a RAID log but for larger projects, use Smartsheet instead.