All these items were patched to properly drop on September 1st, 2023.
'Mythical' items !
Note that this is not a bespoke game system called mythical items ! It's a play name that some members of the community use to point out certain items. It's intended to draw attention to which items either aren't dropping or have an unusual drop rate / occurence.
Also note that some items are just truly rare such as the Jetpack Base
Holographic Mirror (I have looted over 60 of the other collection pieces but still no Mirror).
On launch these were dropping frequently.
Wayfar Spy detonators
Stage backdrop case from stage backdrop generator collection