Please I have a question. Some of my referrals I don't know them . They just saw my link and registered tru it. I can't contact them to update their app. Will I loose their rewards also?

you can claim in v2 of the app which is now live on the play store and the App Store. Please read this medium article fully which explains everything https://legionnetwork.medium.com/legion-super-app-v2-launches-be4bea482a27

Please read this article completely, all your questions will be answered. https://legionnetwork.medium.com/legion-super-app-v2-launches-be4bea482a27