So your client wallet builds RBF into the txn then, not the node. That walletrbf setting is only for the node wallet in Bitcoin Core itself.
Discussion
To clarify: using electrum on top of core and connecting to it from Sparrow means all your node is doing is broadcasting the transaction it receives.
Yes that’s what I’m saying. I sent the transaction to my sparrow wallet from my node wallet. The transaction on meme pool has a red rbf tab. To also back this up I was saying that my sparrow wallet also said rbf not available