you could say a few things: Hey, are you home yet? Are you home yet? Are you home? if you wanted to do sort of short hand/ "text talk" -> Home yet? or You home yet? The last two are technically not standard English, but I've seen plenty of native English speakers use this in text messages.

Home yet ? Is an English shorthand sentence for the question " Are you home yet ? " Sometimes shortened phrases become " standard terminology " even though its grammatically incorrect. It is used quite often in speech and texting, but not in formal writings. When you say it to someone you sound the end of the statement with the intonation of a question.