Hi! I use the TP4056 to safely charge the 3.7V LiPo and protect from overcharging etc. not to directly power the Nano 33 BLE. For that, the battery output goes via a boost converter to the Nano's VIN.
I know I could power the Nano directly from the LiPo through the VIN, but I thought it would be better to use the TP4056 for extra safety.