I've killed the final boss on genisis on all difficulties and even have my alpha implant for beating it, yet I didn't unlock a single one of genisis 2's tek stuff. :
King Titan Arena (Extinction) - ARK Official Community Wiki
System Root (Genesis: Part 1) - ARK Official Community Wiki
ARK: Survival Evolved for Nintendo Switch - Nintendo Official Site
ARK: Genesis — How to Beat the Final Boss | ARK: Survival Evolved
ARK GENESIS 2 ROCKWELL FINAL BOSS BATTLE [FINAL BOSS ADMIN COMMANDS] - YouTube