I think we can not because i still have the regular Indrik fragments in my Collections Menu and it does not let me make another one. Since deck fragments are also under Collections Menu i believe they are coded same way.
even if you collected all the fragments again, it wouldnt let you combine them
one of the fragments comes from one of the story quests, i do not know if you could get that a 2nd time running another character through the story anyway
i have my main house (grand topal hideaway) listed in the housing tours, it has multiple target dummies, scribing altar, and grandmaster stations (in progress being filled out), as well as almost every antiquity furnishing on display to preview them
i think i have 3 or 4 of the fragments collected again, i know one of the ones im missing is the one from the story quest, but as far as i know there is no point to collecting them a 2nd time
i have my main house (grand topal hideaway) listed in the housing tours, it has multiple target dummies, scribing altar, and grandmaster stations (in progress being filled out), as well as almost every antiquity furnishing on display to preview them
i havent been trying to collect them either, at least 3 of them come from basic activities such as WBs, delve bosses, and volcanic vents which usually happen while doing daily quests
i have my main house (grand topal hideaway) listed in the housing tours, it has multiple target dummies, scribing altar, and grandmaster stations (in progress being filled out), as well as almost every antiquity furnishing on display to preview them