You can collect AliExpress app coins by participating in campaigns/games. When you try to get coins, you will receive a reminder about whether the coins have been added or not.
If you receive the reminder, “To protect the security of your account, please use another device to sign in”, you may not be able to access your account due to a potential security risk. Please check whether any unusual activity has occurred on your account.
You can check whether you have received coins using the AliExpress app: Coins & Coupons > Coins Amount >
My Coins.