The possibility to commincate with the phone through the USB cable is super useful (in many ocassions both deviced could not connect to the same wifi). This was possible with sideSync but now sidesync is no longer supported and Flow only allows wifi communication. To finally solve this, Samsung introduced DEX for PC, but Galaxy 9 is not supported. Why not???
Have you tried using smart switch yet. DeX support for pc and mac is for the note 10 as far as I know right now. I have a note 9 and can not use dex on my mac computer. But the note 10 can use dex on the pc and mac. I can only use smart switch to transfer data to and from my phone.
Thanks for the suggestion, but as far as i know, smart switch is only for file transfer. Interacting with the phone, e.g. notifications, calls or screen mirroring are not possible.