Hello together

I just joined and want to invest my money in ETFs mainly for the long term.

The core will be the $VGWL (-0,08%) (actually VWRL but I can't find it here).

Besides that I also have a few $QYLD and $USOI bought. Since these yield incredibly high distributions (QYLD approx. 15% and UOSI approx. 30%), I ask myself where the risk lies with the titles and why these can pay out so much. After all, high yield is usually matched by high risk.

Can anyone enlighten me on this?

Thanks a lot

Sven