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I don't think that that's necessarily a huge issue, though, because their aim wasn't to address that.
A 2020 article, before the current success or the prior one at the same facility:
https://www.powermag.com/fusion-energy-is-coming-and-maybe-sooner-than-you-think/
So if I understand this aright, on the specific thing they're working on, they're at 1.54 as of OP's article, that is (3.15/2.05), up from 0.6 in 2020. The target is somewhere "well above 10" for a commercially-viable fusion power plant. Still other problems to solve, but for the specific thing they're working on, that maybe gives some idea of where they are.
Yes.
googles
It sounds like the additional power is due to energy exiting the system:
https://en.wikipedia.org/wiki/Fusion_energy_gain_factor
So it sounds like additional power requirements effectively means getting from their current 1.54 to 5.
I am confident that that is not the case. The US knows how to do fusion weapons and has for decades -- that's what a thermonuclear bomb is, the second stage. That's a much simpler problem than fusion power generation. You don't involve lasers or magnets or other things that you use in fusion power generation if you just want a fusion weapon; you only need to force the material together with a great deal of force for a very brief period of time, and then you're done.