Yes and no?
For one thing, like >>10702320
said, Japanese indie tends to be very high quality. And most of the indie brands have been around forever (like And Romeo and MAM). There isn't really a sharp divide between those and a bigger brand like VM. So girls that wear any brand will also wear any indie, and might even look specifically for indie pieces because they're more unique and special. And there's always tiny brands that you can't even find as a westerner, they don't have webshops. You'd only find them if you went to lolita stores and events in Japan and talked to people.
However, there's a lot of Japanese lolitas who collect only one brand. Like internationally most lolitas just wear a substyle, like sweet, but in Japan you have girls that aren't sweet lolitas, they're BtSSB-only lolitas (for example). That's why you can find so many meet-up pics of entire comms wearing the same brand or the same coord.