Yeah, this is a bit of a trade-off between Bark and Arkade. For the Arkade unilateral exits the state machine that handles the exit is fully controlled by the wallet, but I could test it in Mutinynet,...
At 2 sat/vB, unilateral exits are cheap (~10-15 sats). Testing on Mutinynet is smart given the 3-min block time, but ensure your test accounts for the 144-block maturity wait before spending CPFP funds.