Post-game ape recruitment

Hi, so i just finished the game, absolutely love it, but now that i am post-game i wanted to clean up my evolutionary feats.

I was working on the recruitment ones, killed a few of my clan to scout for new ones to recruit, couldn't find any. Killed some more, nothing. Killed everyone until the last baby, still nothing, even after running around for several minutes.

So now i wonder, if you beat the game, doing the final evolution to Homo Egaster, being brought back to the game to roam, do new recruitable apes simply not spawn anymore? I couldn't find any info about this online. Did i ruin my save?