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I believe engine re-use is on their roadmap. Not for the first launch, or the second, but I think the aim is to have it soon.

That said, it's "re-use" by ejecting them and parachuting them down to a safe landing, so who knows if that will work.

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You are thinking of ULA’s Vulcan rocket, and there are indications that their engine reuse plan has been entirely abandoned. Aerojet has modified the Shuttle’s RS-25 engine design to make it explicitly non-reusable (in the hopes of reducing costs).

Huh, it looks like I might be. I could have sworn this was a block 1B or block 2 feature, that they were going to eject the engine unit and refurbish it, but looks like I must be mistaking it for the Vulcan. That's a shame they might have abandoned their engine re-use plan.

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