Thanks to the first option, users can report WhatsApp accounts by flagging certain messages. To do this, you need to pinch the desired message for a long time. This feature is intended to help you combat spam, harassment, spam or illegal messages.
The flash calls feature allows Android users who reinstall WhatsApp on their device to verify their phone number using an automatic call instead of SMS. The messenger team claims that this is a much safer option, since everything happens inside the application.
Apparently, these updates are rolling out gradually. They may not appear on the phone right away.