Subscription option is not appearing on the comment form for sub lesson upload post

[basylvalencia]

I checked all the post types in the strc options, however not sure how to control or show the notify me for sub lesson category. See attached for your reference.

Is this possible? Though if I manually update the subscription in the backend it work and it notified in the sub lesson category which I assume working but not just showing in FE for the option to notify me in replies.