Samsung Galaxy S8 and later have Dex. Galaxy S20 shown in this video.
Wimaxit Display Supplied with a long usb C cable short one listed below.
I paid £135 from Cex for my Galaxy S20
Phone powers the display.

As an Amazon Associate I earn from qualifying purchases

US
12” Display Wimaxit M1161CT https://amzn.to/3zFzsyO
Magnetic phone mount & pad https://amzn.to/3XEm2v9
USB C short cable with 180 bend https://amzn.to/3ztqBAi
USB C adapter with 180 bend https://amzn.to/4exKRQ7

UK
12” Display Wimaxit M1161CT https://amzn.to/3TFhsvg
Magnetic phone mount & pad https://amzn.to/3ztFFxO
USB C short cable with 180 bend https://amzn.to/3zxqQdF
USB C short cable with 180 bend https://amzn.to/3MU1UQE

Amazon US & other Countries Links
Orico nvme usb caddy https://amzn.to/3XQa6Yi
USB C to micro USB adapter similar https://amzn.to/3ygZDv5
Ugreen usb sata https://amzn.to/4c2s6Td
52pi ice tower plus https://amzn.to/4bBzUfn
x1003 https://amzn.to/4aaGGr6NVMe
longer pice name cables https://amzn.to/3JHHZCP
board under Pi 5 Geekom X1002 https://amzn.to/3UsJbQB
Nvme Patriot P310 2280 https://amzn.to/3UzX5Rq
ICE Tower Cooler for Raspberry Pi 5 https://amzn.to/3siJ92Q
75% Keyboard / mouse https://amzn.to/3w4uA4F
Usb C to C power display cable 100W https://amzn.to/3qoXsxZ
Usb C coupler / joiner https://amzn.to/47eMWNg
Micro hdmi cable https://amzn.to/3FmtFgP
3.5 audio usb https://amzn.to/45xa08M
Kingston a2 64gb https://amzn.to/33HBrCD
Kioxia Micro sd card https://amzn.to/3rNpGXO
Samsung evo select 128gb micro sd https://amzn.to/3Qn4jpx
Crucial SSD https://amzn.to/46dMOO8
Orico usb hub https://amzn.to/462DNah
Samsung Bar usb drive https://amzn.to/45IgMcF
My Pi 4 case https://amzn.to/3Pkes4t
Raspberry Pi 4 https://amzn.to/46pb5Av
Mini remote https://amzn.to/3EAY3ni
Logik K400+ keyboard https://amzn.to/3BUiDN5
My capture device Avermedia GC513 https://amzn.to/3G1LPDQ
Wimaxit 14” Touchscreen https://amzn.to/3kPDgRl

My Amazon UK store
https://www.amazon.co.uk/shop/leepspvideo

Amazon UK Links
Orico nvme usb caddy https://amzn.to/3YJ1y6m
USB C to micro USB adapter https://amzn.to/3YhUAFq
Ugreen usb sata https://amzn.to/4c2s6Td
52pi ice tower plus https://amzn.to/3wOCqjk
x1003 pice name https://amzn.to/3Wk6duB
pie longer cables https://amzn.to/3y1RIRU
NVMe board under Pi 5 Geekom X1002 https://amzn.to/3w3EZxv
Ice tower cooler Pi 5 https://amzn.to/3MAPL3m
Nvme Patriot P310 2280 https://amzn.to/48csNHP
75% Keyboard / mouse https://amzn.to/3U8MF9D
Usb C to C power display cable 100W https://amzn.to/3D8GRWV
Usb coupler / joiner https://amzn.to/3QIDoDN
Samsung evo 128gb sd card https://amzn.to/3Sczfdg
HDMI to micro hdmi https://amzn.to/3tGq3UA
Samsung Bar usb drive https://amzn.to/3sRqbjI
Raspberry Pi 4 https://amzn.to/3LeeIAL
Kingston 64GB A2 https://amzn.to/2NTnkPm
Crucial 240GB SSD https://amzn.to/37LLc0V
YCCTEAM Xbox 360 Wireless controller https://amzn.to/38to6ya
my pi 4 case https://amzn.to/3ZfFyyv
Logitech K400+ keyboard trackpad https://amzn.to/3otsF0EOfficial
My capture device Avermedia GC513 https://amzn.to/2MnbXhW
Wimaxit 14” Touchscreen https://amzn.to/3sOpDLg

Monitor videos

WIMAXIT 12” Raspberry Pi compatible Touchscreen display
https://youtu.be/B4UClh_AigQ

10 Touchscreen monitors for Raspberry Pi.
https://youtu.be/TVDdvaAKcnw

source