1. Go to your Instagram profile, and click on the Professional Dashboard.
2. Scroll down and choose the Branded Content option.
3. Select Request Approval from Brand Partners.
4. Enter their name in the address bar.
5. Search them from the list and tap on Request.
6. This will send a collaboration request to them.
Collabertoating with other influencer on instagram is great for building additional PR. it will open more oppertunities for more advanced and audience with hight intent.