What I mean by not detected is that the counter for free space at the bottom says 10MiB only. I want to tell the installer to go there for install

I know where sda6 is what I need is to tell the installer that specific partition is where I want to install fedora

sd6 is the free ext4 partition i wanted to install to that won’t get detected. Fedora only detects 10 MiB free and if you check the partitiona in tge installer in the second image, it’s under ‘unknown’ ratger than where I want as free space for some reason