Maz is also the same character who glossed over the magical reappearance of a lightsaber that would have disintegrated in a gas giant (Bespin) within seconds of falling into it at the climax of ESB, so her word is hardly worth a Gungan’s foot.
Well she did say it was “a good question, for another time.” Sorry she didn’t get verbose in the middle of a First Order attack. The reappearance wasn’t magical at all. She said she had it for ages and kept it locked away. We don’t know how, when, or where she got it, and it is probably silly to debate the properties of gas giants in a fantasy movie with lightsabers and hyperdrives.