Smartphone fast charging technology that breaks the current 150 watt (W) limit is projected to hit the market by the end of 2022. However, OPPO reportedly aims to go even further with a new 240W standard. It is apparently in testing right now at the OEM's factories, although it may still have some critical issues compared to existing or potentially emerging solutions. https://www.notebookcheck.net/OPPO-s-240W-smartphone-charging-solution-still-can-t-beat-Vivo-s-upcoming-200W-upgrade.635238.0.html
These kinds of charging rates are hard to take seriously, to be honest, based on the hard limits of current battery technology and basic physics.
Even stacking cells in parallel, it seems unlikely that a smartphone would be able to achieve a battery pack voltage of much more than 20V, not least because of the inefficiencies of having to step such a voltage back down again to meet the likely sub 2V needed by the SoC.
In that case, you're talking about approximately 10A of current, which is just preposterous. And even if you magically managed to get around substantive heating due to resistance, even at a 99% efficiency, the phone will likely be over 50 degrees Celsius, or hotter, in a matter of seconds with even just 2.4W of heating.
This sounds like a misleading gimmick at best and flat-out lie at worst.