BLE blocks (App Inventor vs Thunkable X)

Pls explain me how to work with BLE in Thunkable if it has so small funtionality?
I have changed App Inventor to Thunkable because of design capability: Thankable has more developed design facilities.

BUT what’s wrong with BLE in Thunkable?
Compare BLE blocks App Inventor and Thunkable:

Thunkable has 5 blocks against a huge amount App Inventor blocks.

For example: how to Register String in Thunkable? Not Receive but Listen to Strings?