firebase 9 query realtime database for key - node.js

Question

I want to query realtime database using firebase 9, I previously used admin sdk, i have this example that works but I am having problems adjusting to version 9. I cant find any solid examples on how to use those modular methods to query. Any examples would be appreciated.
version 8
return admin
.database()
.ref("Countries")
.orderByChild("name")
.equalTo(query)
.once("value")
.then((data) => {
if (data.exists()) {
const obj = Object.keys(data.val())[0];
const country = data.val()[obj];
return country;
} else {
return null;
}
})
.catch((error) => {
console.log("error finding country name", error);
return null;
});
what I have tried
const { getDatabase, child, get, ref ,orderByChild,equalTo} = require("firebase/database");
const toFind = "USA"
const dbRef = ref(getDatabase());
const query = await get(child(dbRef, `countries`));
//orderByChild
//equalTo
UPDATED SOLUTION:
const dbRef = ref(db, "/countries");
const queryConstraints = [orderByChild("name"), equalTo(name)];
const country = await get(query(dbRef, ...queryConstraints));
if (country.exists()) {
console.log("found by name", country.val());
} else {
console.log("No data available");
return null;
}
} catch (error) {
console.log("====================================");
console.log("error getting country", error);
console.log("====================================");
}

Answer 1

You can keep adding those QueryConstraints in query():
const db = getDatabase();
const dbRef = ref(db, "/Countries")
const queryConstraints = [orderByChild("name"), equalTo('value')]
const dataSnapshot = await get(query(dbRef, ...queryConstraints))
Also checkout:
How to read, write and query data in Firebase Realtime Database using Firebase SDK v9 (Modular)
Working with lists on web