Can vouch for the nomad. Battery is about 6 months and can be wirelessly recharged in a day. Speaker is a bit quiet but functional. Updates reliably and frequently.
There are none from Apple but in the past I have used Chipolos. They have some which are the size of about 3 stacked credit cards and fit in my wallet easily. The (at that time) did not feature UWB tracking but had a decent loudspeaker. Unfortunately they are single-use only and once the battery ran out (happened to me after about a year) you had to throw it away...
