This one stumped me. I don't think it's
Aequidens or
Andinoacara because the horizontal black stripe in those species runs in a mostly straight line down the middle of the fish and connect with the spot on the caudal peduncle. As you see in your fish, it goes upward at an angle to the base of the dorsal fin.
Then I thought it looked like
Tahuantinsuyoa macantzatza, but something about the facial patterning and shape was still off. So I was scratching my head trying to figure out which fish were similar to
Tahuantinsuyoa, and it dawned on me... it looks like something from
Bujurquina.
Several of the
Bujurquina species have a black horizontal bar that angles up toward the dorsal fin, like your fish pictured above, and several of them also have the blue spotting on the face and gills versus more striated/lined patterns of the other acaras. That's my guess and I'm sticking to it for now.

I'm going to send Jeff Rapps a link to this because he's worked with
Bujurquina and maybe he can confirm or deny it.