If it’s on your desk, you may also want to consider checking under accessibility in your device settings. You should be able to enable the setting to make your phone’s camera flash blink for notifications.
On my S23U it’s under Settings > Accessibility > Advanced Settings > Flash Notification.
Otherwise, all I can think of is a Fitbit. It requires an app but lasts a good week on a charge. It also tracks your sleep and fitness. One of the smaller models can be neat without leaving too much into the usual smart watch type stuff.
drstupid