i have 3 soul drops, over 600000u amd the other 3 upgrades and still nothing. maybe i just need to wait more or maybe there is some progress trigger. i dunno.
UPDATE: you need 45000u, 1 soul drops artifact, and you must have the first 3 upgrades all installed and wearing the suit. I had the first 3 but only installed 2 to avoid the dark energy usage