react-native-firebase/docs/firestore/query-limitations.md

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Query limitations	Cursor snapshot queries have limitations.

Cloud Firestore does not support the following types of queries:

• Queries with range filters on different fields, as described in the previous section.
• Logical OR queries. In this case, you should create a separate query for each OR condition and merge the query results in your app.
• Queries with a != clause. In this case, you should split the query into a greater-than query and a less-than query. For example, although the query clause where("age", "!=", "30") is not supported, you can get the same result set by combining two queries, one with the clause where("age", "<", "30") and one with the clause where("age", ">", 30).