Yes, you can write a node script w/ firebase admin to iterate over all documents in each collection and then call the appropriate mongoDB/faunaDB libraries to insert the records.
Although I'm not as familiar with it, you could also look into trying to extract the data from a Firestore backup file.
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Yes, you can write a node script w/ firebase admin to iterate over all documents in each collection and then call the appropriate mongoDB/faunaDB libraries to insert the records.
Although I'm not as familiar with it, you could also look into trying to extract the data from a Firestore backup file.