When using a usb headset, No problem with Chromium browser.
I think it's a problem with the Realtek sound driver. Any advice?
I believe that seems to be the case. I also have the Ryzen 5/8 GB model and when viewing content on Youtube or Netflix with my Bluetooth earphones I can't seem to notice any delay, unfortunately that's not the case when using the laptop speakers. If it's a fault with the speakers or the the Realtek driver I can not say for sure.