another cheap 3rd party adapter
https: / / imgur.com /a/KE5I3ZS
it works as screen mirror when not powered through usb-c socket both on galaxy S8 and S9
after attaching standard Samsung charger to adapter's usb-c socket S9 automatically launching DEX, adapter is getting hot but nothing wrong was observed during more than 1 hour constant use
things are different with Galaxy S8
after attaching power to adapter, screen on TV/Monitor going black (no signal) and phone gives message "HDMI disconnected"
any clue why it is working on S9 but not on S8 ??
S9 - SM2G960FZKDXEO - G960FXXU2CSB3
S8 - SM-G950FZKAXEO - G950FXXU4DSBA