AR - Mobile - Android/iOS - How to achieve background removal like Teams and Google Meet ?

Hello everyone, first of all thanks for reading my question.

I want to achieve something like Teams and Google Meet, where to user can blurs their background or put any image they want and pretend they are at a pool party at 7 am.

I want to add this to my app that uses ARFoundation. The user is being filmed by someone during the game and I would like to have be able to accurately (or not) detect the user's body to do the background removal.

Anyone has experience with something similar ? What tools or technique would I need to use ? I don't mind buying something off the Asset Store if needed.

Thank you ! Any help is appreciated.