This was a big issue ~5 months ago, and they ended up unbanning all of the linux players (I know reddit sucks, I'm sorry, but it's currently the best source of info I could find): https://www.reddit.com/r/apexlegends/comments/11gaefo/ea_is_falsely_massbanning_steam_deck_and_linux/

However, three reports from this morning (including myself) just rolled in, as well as a few others from the past month (check recent replies): https://answers.ea.com/t5/Technical-Issues/Linux-players-getting-banned/td-p/12338557

One of the banned players from this morning was also banned (then unbanned) when this was an issue 4-5 months ago.

More recent reddit posts about it: https://www.reddit.com/r/apexlegends/comments/15uqt7w/linux_users_getting_falsely_banned_again/ https://www.reddit.com/r/linux_gaming/comments/15ur654/apex_legends_linux_users_getting_falsely_banned/

Valve's github issues: https://github.com/ValveSoftware/Proton/issues/4350#issuecomment-1684189384