Ask to buy not working.

Hello!

I’m here to ask for help. So basically, I have a 9 y/o daughter, and she plays Roblox, and wishes to have the in-game currency, Robux. We have a Family sharing account with just me and her. So she’ll go onto Roblox, and open the Robux section. Then she’ll click the amount of Robux, enter her Apple ID code. And then, the ‘Send request’ comes out, and she’ll click ‘Send’ and me, on a Anderoid phone will not get the notification. If you can’t solve it because it includes my Anderoid, that’s fine. If you can, thanks so much!