Just because you can hear it doesn’t mean everyone can. Beeps are interruptive too.

My microwave has an option to turn off all the beeps, and it's a landlord special so I imagine others can do the same. Check your model and see if it has that option.

For mine, I literally need to hold down I think the number 3 for 5 seconds. It's in no way obvious.

Or make idk, a bamboo rod sound or something calming