I don't think you can still reverse the transaction if it's not RBF most of the nodes right now like the above said it most like be reject but you can try to broadcast your new transaction to some broadcasting sites listed here

Then use this tool below to generate a raw transaction and sign it in your Bitcoin core wallet and then broadcast it to any pushtx listed above.
- https://coinb.in/#newTransaction

Let's hope that there are still a few nodes that accept non-RBF transactions.