There's nothing lore-breaking about this. Both the Qubeley Mk-II and the Psycho Gundam Mk-II made this possible already. It's possible to deploy them for a short period of time until propellant is depleted. Kshatriya also used it inside a colony (albeit with difficulty), but it's not impossible.
Moon Gundam is in many ways a proto-Unicorn Gundam in that tons of unused ideas from an older draft of Unicorn. Harutoshi Fukui did both too. Compared to Unicorn, I see that our mentor character who newly became a Newtype has become Moon's Mackle too, only Char was the one rather than Full Frontal.
Of course not, in ZZ EP 35, inside the colony that just entered Earth therefore is subject to Earth's gravity, Ple in a Qubeley Mk-II takes on Ple 2 in the Psycho Gundam Mk-II and both use funnels against each other.
Ubaldo hard carries the team with how stubborn he is despite of any injury. My guy could've solo'd half of Char's goons with their suped up Psycommu MS's with a GM and come out alive. God speed to him for being a absolute champ