how to know the username of the person who shared an instagram reel link with you on whatsapp

so i opened the link about 2 weeks ago and the account was showing up. the username popup. but now after a few weeks when i open the same reel the username isnt popping up. the thing is i am no creep, its just that the person has used my pic as their profile pic and i just wanna make sure if theyve removed it. would really be grateful for anybodys guidance on how should i find the username again with the same link