Depends on what the emblems are. Some emblems are not actually emblems, and are variants of other emblems. The most common ones people run into are certain crucible and gambit variants. If you take the base activity emblem from your collection, you can inspect it and equip the variant the same way you would an ornament on a piece of gear.
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Joh ty didnt even know about that lol
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It was primevil prime and ludomanical emblem
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Yep, those are two of the primary ones in question. Pull the "Playin' The Odds" emblem from your collection, and you can equip either of those two as variants.