I think i may have found the cause of the issue, it seemed to be the OperaGX forums notifications for new topics, which i then turned off from the settings, now the sound seems to have stopped.

I could describe the sound as a supersaw chord impact that lasts less than a second. I feel like there is a 2-3 minute pause between every occurrence. I've tried checking the Easy Setup and notifications, but nothing there that i've tried seems to fix it.