That is a bit short. Please check whether your antenna is damaged. Sometimes one of the small components in the green PCB gets ripped off. Happened to one of my boards without me noticing it. Others have reported this in the forum.
The Arduino Nano 33 IoT is a nice WiFi enabled Arduino. The SAMD21 microcontroller is used on other boards e.g., from Adafruit as well. It has good peripherals e.g., I like the analog comparator. Most of the BLE and WiFi code runs on the NINA module. The SAMD21 just runs some high level code of the library. The ArduinoBLE library works the same but does not rely on mbedOS.