Do I need ble antenna for the weather environment monitoring project?

I have broken the ble antenna on my rak chip and was wondering if it’s safe to run the Environment Monitoring Example without the ble antenna attached

If you are not using BLE in your code (you are not transmitting and there is no need for any reception of BLE signals), then it should be fine. But of course you should put the two antennas included in WisBlock Core on your final application/product.

the ble adapter broke off, will it be ok if it just uses lora?

I am not sure what is the adapter you are pertaining to but if you are only using LoRa then all should be good.