A fresh leak says Apple is testing Face ID placed under the iPhone display. The claim comes from a Chinese leaker on Weibo who calls themself Smart Pikachu. The report says Apple is using a spliced micro transparent glass window in the panel to let the Face ID sensors work through the screen.
This is not the first time such claims have appeared. Other recent reports said Apple may not put Face ID under the display and might use a smaller hole camera instead. That makes the whole topic uncertain. Apple has tested many display and sensor ideas over the years.

What the Leak Says
The Weibo post says the new process uses spliced micro transparent glass. The glass would let infrared light and the camera pass through while keeping the display intact. The leaker says the supply chain is starting to prepare for production. The story notes that the work is advanced enough to reach production planning.
Smart Pikachu is not a well known Apple source. The post is interesting but it is not proof. Past leaks from other sources have gone both ways. The rumor mix shows that testing may be real but a decision has not been finalised.
What it Means
Putting Face ID under the screen would cut down the need for a large notch. The notch holds several sensors and the front camera. Some sensors might still need space. That could mean a smaller notch or a small window may remain even if Face ID goes under the display.
A supply chain move does not guarantee a final phone design. Apple tests many parts and processes. Some tests become products. Many do not. The company often changes plans late in development. That is normal for complex devices.

How to Read the Risks
Treat the leak as an early signal. Do not take it as confirmation. Watch for more supply chain reports from vetted sources. Also watch for supply parts orders and mass production notes. Those items often follow when a design is locked.
Why the Notch Might Remain
The notch includes more than Face ID. It has ambient light sensors and a front camera. Even with under display Face ID, Apple may still need some space for other parts. That is why some analysts say the notch or a small camera hole could stay.