Ok so, you did an introduction, and it was successful.
Why did you separate them?
At that point they should have been put in the same cage unless they balled up.
You've done the leg work with scent swapping etc... they are ready, unless they fought and balled up.
Separating after successful uneventful introductions can stress the gliders, and potentially make the next intro not as successful. This is why once they meet and get along we don't separate. Sometimes it makes more work for ourselves that wasn't necessary.
Uninterested in each other isn't a bad thing, they are already used to the others smell from scent swapping.
Uneventful introductions are what we hope for
So if there was no fighting and balling up, and you introduce them again tonight if there is still no fighting or balling up.......offer them a clean sleep pouch and put them in the same cage, don't separate again.
IF they ball up in the cage, THEN it's ok and necessary to separate again, but only then.
light crabbing at each other together in the same cage, is normal in the first few days and doesn't usually warrant separating them, they are just working out whose in charge and that can take a few days to sort out.
You will still need to monitor them for a week or so once they are in the same cage to make sure they will live together well with no issues.
Offer two feeding stations instead of one to reduce the risk of food aggression.
I used to clean the cage and toys etc.. that newly introduced gliders would be living in together to make it as neutral as possible.
But unless there are some subtle signs that there could be an issue with the pairing, I don't do that anymore. I've found the gliders actually have less issues when I don't do that.
Personally I only allow one sleeping pouch for newly introduced gliders, I remove any toys that allows a single glider to hide out in, under, or behind. Once I know for sure that it's successful they get all their hidey toys back.
This way, if there is an issue and they aren't sleeping together regularly it's easier to spot. If one of the gliders is separating itself from the other/others it's a good indication that glider has not been fully accepted, even if there is no fighting or balling up.