It seems popular to want to suppress them from making a noise when the food is ready, and to be annoyed if there's no silent option - or to prefer ones with mechanical bells that can be removed.
I bought a cheap Whirlpool microwave ($200), to replace my cheap Frigidare that lasted 20 years. It has this silencing feature and I love it. You hold 2 down for 3 seconds and it silences all beeping until the next power cycle. My only gripe with it is that it also silences the timer going off (ie, not using the oven, just the timer), which seems a little boneheaded.
Some models let you do this but don’t advertise it. You have to always check their manuals online before buying. Often it’s a question of hitting a magic combination of buttons at initial configuration (when it’s powered up). Some of the higher end microwaves like from Panasonic or Breville or others are more likely to have this.
