Currently you can connect a facebook page and instagram account under integrations and then create a workflow that lets you respond to comments on "posts". This however does not "see" reels.
posting reels is advantageous because reels reach a wider audience and not just your subscribers, and the formatting is inline with the 16:9 format for tiktok, youtube shorts etc..
Many chat, for example, can auto reply to comments on reels. However high level can't see reels, and only can auto reply to comments on actual posts. This is the only reason why our users have to maintain a many chat subscription, and would love to move that to high level.