Unable to check whether a field exists in a nested collection Firebase v9

Sorry I'm still new to this, but I'm trying to check whether a specific field (docName) value already exists in a nested collection to perform as a condition. I'm new to v9 and I'm slowly working my way around it, but I've looked all over and I'm still unable to get the appropriate solution.

Ref:

'teachers/${uid}/contracts/autoDocID'

What I have tried

const Contract = async (data) => {
    const q = query(collection(db, "teachers", data.uid, "contracts"), where("docName", "==", `${data.docName}`)); 
    const condition = await getDocs(q).exists;

    if(!condition){
        //adding new doc
    }
}

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