How do I get the comments from a Planner task to use in Power Apps?

I've been asked to create a Power App that imports tasks from Microsoft Planner and the comments that have been added to each task (using the Planner web app).

I was able to access the plans, buckets, and tasks by using the Power Apps preview Planner connection and the Planner API as a reference.

Though I can't currently access this in Power Apps, it appears that the Graph API for Planner will pull in the "conversationThreadId" for each task.

(I think that https://graph.microsoft.com/v1.0/groups/[GroupID]/threads/[ConversationID]/reply retrieves that conversation once I have the needed IDs.)

Is there a way for me to access this conversationThreadId through Power Apps' Graph API?