If you have properly authorized and attached a professional Instagram account, you may see "brands mentioned" on your profile. These mentions are from brands you have tagged in the captions of your Instagram posts. If those brands are on Perlu, your profile will show that you've mentioned them! Only the top 9 brands you've mentioned (based on Perlu activity) will be visible.
Therefore, if you don't have a properly authorized professional Instagram account attached to your Perlu profile - or if you haven't mentioned any brands on Perlu - you won't see any brands mentioned.