For the soundtrack it's very nice to see that they already made a nice promo track in the style of synth driven/programmed music that many would consider Retrowave, Synthwave, Electrowave, or Dark Electro.
This is definitely fitting the above genres.
I additionally believe they should incorporate music from artists/musicians/bands that do music that would be considered Electronic Hardcore/Punk, Digital Hardcore, Electronicore, Hardcore/Punk, Synthpunk, Darkwave, Industrial Rock/Industrial Metal, and Deathrock/Goth/Gothic Rock.
I make mention of those genres/styles since they do reflect the music that would be happening in that time even long after those 'scenes' died, as they come and go in preference and 'popularity'. In the art and scenery of Cyberpunk there is still the existence of Punk Rockers dressed in the Spikey Jackets and Charged Hair, which means that in many ways it shows that any style of music tied to the roots of Punk/Hardcore and Post Punk still exist, they may even incorporate Synth/Keyboard and Drum Machine.
My (exhaustive) suggestion list of artists/bands:
-6FS
-Alec Empire
-Alice In Videoland
-Alien Sex Fiend
-Angelspit
-At All Cost
-Atari Teenage Riot
-All Gone Dead (Song: "The Holy City Of Karbala" and any of their material)
-Amebix
-Balzac
-Bauhaus (Spy In The Cab, Scopes)
-Big Black
-Billy Synth and The Turn Ups
-BIRTH
-BLXBLTN
-Brainiac
-Cabaret Voltaire
-Catholic Spit
-Cellphone
-The Chameleons UK aka ChameleonsVox
-Chrome
-Clan Of Xymox
-Clock DVA (Song example: The Hacker)
-Cobra Killer
-Combichrist
-Crime
-Cybergrind
-Cyberpunk
-Cybotron
-Danse Asshole
-Dead Kennedys
-Den-Mate
-Devo
-Death In June
-Death Spells
-Deathride 69
-Debris
-D.I. (song "Bloodstains")
-Die Krupps
-Drab Majesty
-EC8OR
-Einstürzende Neubauten
-Factrix
-Fantomas
-Flipper
-Foetus
-Frontline 242 (Songs: "Headhunter" and all their material)
-Frontline Assembly
-Genitorturers
-German Shepherds
-HEALTH (Death Magic album)
-Horse The Band
-Infrared Nine
-Intro5pect
-Jazz Crabs
-John Bender
-Joy Division
-JuggerNut
-Killing Joke
-KMFDM
-Kodiak
-KompliKations (a synthpunk band)
-Kommunity FK
-Kraftwerk
-LARD
-Lazerhawk
-Left Spine Down
-Lolita Storm
-Minimal Man
-Ministry (early years era i.e. song "Revenge" and even their Industrial Rock/Industrial Metal songs)
-Moira Scar
-Motormark
-My Life With The Thrill Kill Kult
-Napalm Death
-Nausea (Songs: "Cybergod", "Technologikill", "Inherit The Wasteland")
-Nervous Gender
-Nine Inch Nails (Head Like A Hole)
-Nitzer Ebb (best song: "Join In The Chant", all their material is amazing)
-Pere Ubu
-Phantomsmasher
-Pop. 1280
-Public Image Ltd.
-Pure Ground
-Primitive Calculators
-Psyclon 9
-Rabbit Junk
-Red Asphalt
-Red Lorry Yellow Lorry
-Revolting Cocks
-Rudimentary Peni
-Schizoid
-Sexy Sushi
-Siouxsie & The Banshees
-Siouxie & The Creatures
-Sisters Of Mercy (songs "This Corrosion", "Lucretia My Reflection", "Dominion")
-Six Finger Satellite
-Skinny Puppy
-Smersh
-Sonic Subjunkies
-Spetznaz
-Stabbing Westward
-Suicide (an early electronic punk/no wave band)
-Swans
-TV
-The Faint
-The Jesus Lizard
-The Misfits (Cough/Cool)
-The Screamers
-The Shizit
-The Tubes
-Throbbing Gristle
-Tones On Tail
-Tragic Black (Song: Circuit 3)
-Tubeway Army
-VCR (Toronto, Canada)
-V.E.X. (the Oakland, CA band)
-Wire
-Wirespine
-Wrong Hole
-Xerobot
-Xex
-Youth Code
-Zeromancer
Also the soundtrack to the movie called THREAT has good examples. There's so many bands I've known of and have great songs and sounds that reflect a dark dystopian future.