Nonetheless, being able to produce tritium, which is the claim that appears in the headline and the article, is very useful, in part because many reactors use it as a fuel source.

There is only one place where I see “more fuel” show up, which is this single sentence:

The ability to generate tritium within the reactor is crucial. A sustainable fusion energy system needs to produce more fuel than it consumes. This development shows a path toward solving that engineering challenge.

I agree that this single sentence could have been better worded.