There were a bunch of Galaxy-class starships at Earth when USS Voyager returned home. Like nine or so of them. Though that was about 25 years before the last scenes in Picard.
Geordi's been working on the Enterprise-D for twenty years, which isn't that long after Riker took command of the Titan. La Forge was maybe a commander at the time, unless Starfleet gave him a burst of promotions following the events of Nemesis. It may have been an on and off project while he took on other assignments, the Enterprise-D being something he did between them. So, he might have commanded the USS Challenger for a time. Maybe to study its frames so he could better tackle rebuilding Enterprise. USS Challenger might even have been, like her space shuttle namesake, a starship built from Galaxy-class parts. And that project was LaForge working out how to rebuild Enterprise. We only see it in the alternate timeline if 2290 where the Delta Flyer makes it home, but Voyager does not. But eleven years before the Enterprise-D returns would fit with Geordi using USS Challenger as a test project to rebuild Enterprise.
Or maybe he was in charge of the remaining Galaxy-class starships as they returned from missions. Some may have been refit to Ross-class specification. Perhaps in this project they found the USS Syracuse's saucer was too far gone or had been used to rebuild another ship years earlier in the Dominion War, and the damaged stardrive had been sitting around, just in case. With all the other Galaxy-class starships upgraded to Ross-class specs, they didn't have a need for this old stardrive and LaForge takes it in hand for the Museum and Enterprise.
Geordi's been working on the Enterprise-D for twenty years, which isn't that long after Riker took command of the Titan. La Forge was maybe a commander at the time, unless Starfleet gave him a burst of promotions following the events of Nemesis. It may have been an on and off project while he took on other assignments, the Enterprise-D being something he did between them. So, he might have commanded the USS Challenger for a time. Maybe to study its frames so he could better tackle rebuilding Enterprise. USS Challenger might even have been, like her space shuttle namesake, a starship built from Galaxy-class parts. And that project was LaForge working out how to rebuild Enterprise. We only see it in the alternate timeline if 2290 where the Delta Flyer makes it home, but Voyager does not. But eleven years before the Enterprise-D returns would fit with Geordi using USS Challenger as a test project to rebuild Enterprise.
Or maybe he was in charge of the remaining Galaxy-class starships as they returned from missions. Some may have been refit to Ross-class specification. Perhaps in this project they found the USS Syracuse's saucer was too far gone or had been used to rebuild another ship years earlier in the Dominion War, and the damaged stardrive had been sitting around, just in case. With all the other Galaxy-class starships upgraded to Ross-class specs, they didn't have a need for this old stardrive and LaForge takes it in hand for the Museum and Enterprise.