BLE client. How to subscribe for multiple notifications?

Hi.
I've created Android app that serves Location and Navigation service, Device info, and Time service (standard GATT profiles). LNS has 3 characteristics.
Currently in Bangle JS2 client app I can subscribe to one service, one characteristic.

function connection_setup() {
  NRF.requestDevice({filters:[{namePrefix:"Pixel 4a"}]}).then(function(d) {
    device = d;
    console.log("Found device: "+d.name);
    E.showMessage("Found device"+d.name);
    return device.gatt.connect();
  }).then(function(ga) {
    gatt = ga;
    E.showMessage("Connected");
    console.log("Connected");
    lastReceivedTime = new Date();
    return gatt.getPrimaryService("1819"); //How to get another services here?
  }).then(function(s) {
    service = s;
    return service.getCharacteristic("2a67"); //How to get other characteristics here?
  }).then(function(c) {
    characteristic = c;
    characteristic.on('characteristicvaluechanged', (event)=>updateSpeed(event));
    return characteristic.startNotifications();
  }).then(function() {
    console.log("Notifications subsribed");
    E.showMessage("Notifications subsribed");
  }).catch(function(e) {
    E.showMessage(e.toString(), "ERROR");
    console.log(e);
  });
}

How to subscribe for LNS multiple characteristics, and to Time service, and also query Device info? Each .then() has only one return, I am not getting how to fork or chain it.