You cannot appeal a CS2 game ban.

https://steamhost.cn/help_steampowered_com/en/faqs/view/4E54-0B96-D0A4-1557

CS2 game bans can be issued for, including but not exclusively:
* frequent irregular gameplay as detected by VACNet AI or by other means, this includes premade matchmaking with a cheater repeatedly or cheating committed by yourself,
* incessant griefing by verbal abuse, in-game physical abuse or other unsportsmanlike conduct,
* botting and automation,
* manipulation of matchmaker and rating,
* disruption of gameplay on the technical level (such as DDoS attacks or causing crashes)

CS2 game bans are both permanent and non-negotiable.

No vac ban, a game ban and no evidence will be shown to you.

FAQ:
Why are game bans issued?
Game bans in Counter-Strike 2 are issued when a player attempts to circumvent or interfere with game systems to the detriment of others.
Examples include:
Cheating.
Manipulation of matchmaking rank by deranking or falsely increasing your Skill Group or Counter-Strike Rating.
Botting and/or automation.
Intentionally interfering with the normal operation of game servers or other players.
Remember, these are just a few possible reasons.

Can you tell me why I was banned?
No. We do not disclose the reason for your game ban.

Counter-Strike 2 game bans are permanent, non-negotiable, and cannot be removed by Steam Support.