Is there a olive in here already?

I've seen on here some cases of doubled up olives and I def wanna avoid that.

There's some brass ish colored ring in the brake lever body not sure if that's a squished olive or not?

I tried poking around with an allan key but it seemed solid.

Info: this a grx400 lever I got from Facebook marketplace and it came with the compression nut off. I already set up the other lever without checking, realizing the potential problem now. Also I'm using bh90 hose.