You cannot appeal a CS2 game ban.

https://psteamhelp.yuanyoumao.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.

引用自 haveproblem▸шалопай：

mb delete my unfair ban in cs2
why did i banned? i didnt play with any cheats lol, mb can someone help me?

1 game ban on record | Info
41 day(s) since last ban

gameban cs2 - https://psteamhelp.yuanyoumao.com/en/faqs/view/4E54-0B96-D0A4-1557

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.
Game Bans for all of the above are not removed by Steam Support.

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

Whether you were using cheat software, automating matchmaking, or abusing matchmaking the reason a game ban was issued is not shared with users.

Can I appeal my game ban?
No. Game bans cannot be appealed and are not removed from accounts.

I was not using my account when it was game banned. Can the ban be removed?
No. Regardless of who was using the account at the time the ban was issued, game bans are permanent and are not removed.

Can I move my Counter-Strike 2 items to a different account?
No. Counter-Strike 2 items cannot be moved from a game banned account to a different account.

Can I upload content to the Counter-Strike 2 Workshop and Community with a Counter-Strike 2 game ban?
No. You cannot upload new content, such as guides, artwork, or Workshop items to the Counter-Strike 2 Community if you have been game banned.

Can I vote on Counter-Strike 2 Steam Workshop content with a Counter-Strike 2 game ban?
No. Counter-Strike 2 game bans prevent voting within the Counter-Strike 2 Workshop.