Identifying a menu bar icon that looks like a sun

It flashes twice on menu bar on startup and then permanently disappeared. I can't find it again on a fresh reboot. It's best described like a sun (see the example symbol attached below, a circle in the middle and a few lines pointing outwards). I suspect it might be some sort of auto update check on boot. Has anyone seen it before? I'm on Sequoia 15.5. I've checked the Login Items, and none of them stand out.