FYI, a few simple observations on exomoons compared to explaining the origin of our Moon. When looking for answers to the origin of our Moon, I also look at the exoplanets too.
Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b,
https://arxiv.org/abs/2312.03786
"There are more than 200 moons in our Solar System, but their relatively small radii make similarly sized extrasolar moons very hard to detect with current instruments. The best exomoon candidates so far are two nearly Neptune-sized bodies orbiting the Jupiter-sized transiting exoplanets Kepler-1625 b and Kepler-1708 b, but their existence has been contested..."
Space.com has some interesting reports on exomoons and discussions like this thread.
https://forums.space.com/threads/th...and-scientists-may-have-just-found-one.53500/
Using the exoplanet sites,
https://exoplanetarchive.ipac.caltech.edu/index.html, reports 5557 exoplanets confirmed. 946 host stars show exoplanet systems with 2 to 8 exoplanets (multi planet systems). 114 stars show exoplanet systems with 4 to 8 exoplanets.
https://exoplanet.eu/home/, this site reports 5558 exoplanets confirmed. 888 host stars reported with 2-8 exoplanets. 112 host stars with 4-8 exoplanets shown. While our solar system has some 200 or more small moons, we do not know at this time if the other solar systems confirmed in exoplanet studies have moons or any analog to a moon formed via a giant impact like claimed for our Moon at Earth. I can always assume this but not presently confirmed. Here is another solar system report that indicates six exoplanets in orbit, no moons known for certain and super-earths too, something very different than our solar system configuration.
The TESS-Keck Survey XVII: Precise Mass Measurements in a Young, High Multiplicity Transiting Planet System using Radial Velocities and Transit Timing Variations,
https://arxiv.org/abs/2312.04635
My note, from the 33-page PDF report, "Here we present a follow-up analysis of TOI-1136, a system with at least six transiting planets first characterized by Dai et al. (2023, hereafter D23), and a candidate seventh. TOI-1136 is a young (700 ± 100 Myr), bright (V=9.5) G dwarf that has several planets that exhibit significant transit timing variations (TTVs), allowing for the precise characterization of most planet masses with photometry alone...TOI-1136 consists entirely of sub-Neptune sized planets, likely none of them terrestrial. Further, none are large enough to call gas giants, either, and the planet sizes do not follow any clear sequence or demarcation, with the largest planet third from the star. We highlight the architectural differences in Figure 9. TOI-1136’s youth is yet another distinguishing feature that adds to the system’s value.", ref -
https://arxiv.org/pdf/2312.04635.pdf
My note. Are there exomoons orbiting these six exoplanets, all six planets larger than earth? Unknown at present and no indication of a moon formed via a giant impact model like used for Earth's Moon. When I read about science model explanations for the origin of the Moon I see using my telescopes, I like to keep things like this in mind