Most microwaves can be muted so the button pushes are all silent. You will have to look up how to on each microwave model but almost all models have a mute option.
A partner of mine has an above-range microwave with the worst implementation of this that I've ever seen. When you mute the button beeps, it mutes the entire microwave. Food finished cooking? Silent. Manual timer set? Hope you're looking to see when it hits zero. There's no way to silence the buttons without muting all alerts completely.