Can I list the accounts an Instagram profile follows?

Yes. GET /v2/instagram/profiles/{profile}/following lists the accounts a public profile follows, in the order Instagram lists them. Each account is the shared v2 profile summary: id, handle, displayName, avatarUrl, verified and privateAccount. Keep passing data.page.nextCursor while data.page.hasMore is true to reach the end of the list. A private profile returns lookupStatus: private with no accounts. Follower lists aren't offered: Instagram only shows a small sample of an account's followers.