Example code for Nano 33 ble + cell phone

Hardware Nano Family Nano 33 BLE
1

I am using IDE 2.3.2, ArduinoBLE library 1.3.6, Genuine Arduino Nano 33 ble board.

When I go to examples for Arduino Nano 33 ble, I find only Nano 33 ble_system.
Ditto for custom libraries.
No client or server sketches.

More specifically, I am looking for sketches that work with iPhone apps like:
AVA
Bluetooth for Arduino
BLExAR
pfodApp
or any others you may have successfully used.

If all else fails, I can use a successfull Android phone app.

Any and all help appreciated - thanks