My friend Alipay gave me some red envelopes. There were short messages on my mobile phone, but I opened Alipay and the page and didn't see any red envelopes. Can I have them?

Maybe your uncle entered your mobile phone number when transferring money to you, but your mobile phone number may be bound to two Alipay accounts, so it may not be in this account. You can see if your mobile phone number is bound to these two Alipay accounts. You can see if there is a red envelope in that account.