His name is Yusuf Dikeç, he was in the 10m air pistol men and mixed team events. The silver was in the mixed team event, won alongside teammate Şevval İlayda Tarhan. Despite what appears to be an exceptionally successful sport shooting career otherwise, he seems to have struggled in prior Olympic games (“struggled” relative to “qualified for the goddamn Olympics” of course) but apparently he was just on the ball this time