Remote
In the Remote tab you can connect to the external ESP32 (for flashing and setup instructions see ESP32 documentation). The ESP32 tab on top (expand if needed) allows to connect via wifi (websocket) or USB Ethernet:

Besides the USB Ethernet there is also USB serial console with debug logs.
Remote scan shares the same device cards, filters, and Inspect flow as local scan, but GATT traffic is relayed through the ESP32, which acts as a remote “Bluetooth proxy”. Due to more moving parts, the remote features might be less stable than the local ones.
Peripheral simulation (Sim)
ESP32 can simulate (act as Bluetooth “peripheral”) any BLE device, based on a Device Library entry definition. Pick an entry from the list to upload:

Once started, the simulation status shows graphic canvas (managed by active script), information about the used address, optional “local” buttons (simulating on-device interface), and a BLE trace of all incoming packets:

Now you can access the device via BLE - also using of the original applications (links in the Device Library entry).
Demo: robotic dog simulation
Demo: smart lightbulb