What do you mean by "out of band"?
Discussion
Out of the block fee scope, in this case. So you'd pay the fee to accelerate, in lightning, liquid, usd, or worst case a new utxo on chain
I see - what's the difference between that and sending a RBF? Or is this essentially the same thing?
RBF is being able to Replace the fee yourself to speed it up. But the tx needs to have been originally broadcast with RBF enabled.
Miner acceleration is asking the miners.
Similar outcome, yes