SIX uncommon permanent items is well above what a 6th elvel party should have according to Xanathar's. Xanathar's says they should only have eight (7 uncommon, 1 rare) by the time they finish 10th level. You've been generous, ot cheap. But not extravagant ... unless those items also are tuned for the characters - a weapon or armor of the right type for the paladin, etc. If you've been generous in number of items and also given out the best choice items, then the Artificer's ability to give out items for the party will seem lackluster in comparison, as opposed to how powerful it actually is.
So if your six items are things like a Trident of Fish Command, Chainmail +1, an Alchemy Jug, a Bag of Holding and the like - then you're just generous but it's likely not having much of an effect on the utility of what the Artificer gives out. If you're both generous in numebr AND giving out items on their most wanted list, then it really will make the Artificer's ability to not make as much of a difference to the party.