I usually hate all device sounds, but surprisingly this has a reasonably quiet singular bell-like "ding" option, rather than the typical "beep-beep-beep" that drives me nuts.
The only thing that concerns me is the oven modes. It's got this plastic spinner piece that supports the glass turntable that I'm not sure about leaving in, and you can't use the metal tray in microwave mode.
So I just leave it in microwave mode all the time.
Domestic brands over here aren't even trying. Build quality is subpar on everything manufactured on the continent, but thankfully designs are pretty simple and parts are readily available.
Our only choice on larger appliances is basically Miele at 2-4x the European MSRP to get anything remotely reliable. Even then the Miele@Home stuff is nothing but a nightmare so far.
So I can imagine a spec which says "do a cheapest buzzer on its preferred frequency, 1 second period, 50% duty cycle, 3 times" being independently written in 3 different engineering offices, and multiple devices ending up with identical beeps.
[0] https://www.digikey.com/en/products/detail/pui-audio-inc/AT-...
Highly recommend