A:Answer I can confirm that this is using the GDDR6 version of the MX450, however it is the low power variant of 12 watts. It's also strange, because the ASUS website lists this model as the GDDR5 version, but it's clearly wrong. Check attachments below.
You can set the laptop to "Performance" mode to enable the MX450 to boost to 25W using myAsus (software included). However, the GPU will not sustain a full boost clock and will fluctuate. The power adapter must be plugged in for performance mode to work.