No - new field types isn’t related to having custom fields show on subtasks.
Just to be specific: it’s not that you can’t have custom fields on a subtask, it’s that custom fields are project-specific so you need to add the subtask to a project in order to access that project’s custom fields on the subtask.
You can add your vote to have custom fields available on subtasks (without having to add them to a project) here:
Also be sure to see this workaround which might work for you:
Hi @Kenan_Karalic, unfortunately I don’t have any update on the new custom field types. I will update this thread when I’m notified internally about changes in their roadmap/timeline.
Hi @Jenn2, I do not have any new information to share here. Although internal work around new custom fields has not stopped, you should consider them effectively shelved until we reach out with relevant news.