Copy blockchain data from Bitcoin Core full node to use with MyNode

I'm looking at setting up a MyNode Community Edition and already have a Bitcoin Core full node fully working. I'd like to copy the blockchain data from my Bitcoin Core node and use it with MyNode if possible in order to avoid having to download and validate the full blockchain again.

Is that possible?

I saw this guide but not sure if it's only for existing MyNode db data.

https://mynodebtc.com/guide/using_bitcoin_data_from_existing_node

Thanks!