Both LightBlue and Nordic RF Connect show the same behaviour:

ESP32-S3, ArduinoBLE 1.3.7

A name characteristic that is exactly 22 bytes long cannot be read by the BLE peripheral, showing GATT error 7.

BLEDescriptor ECM1PWMName("2901", "ECM1 PWM Speed Control");

Adding a single space to the end makes the descriptor work perfectly.

BLEDescriptor ECM1PWMName("2901", "ECM1 PWM Speed Control ");

Name descriptors both shorter than or longer than 22 bytes work well.