Active BLE connections within Home Assistant?

I've just made some tests with BTHome and Home Assistant as covered by excellent videos from @Gordon:

Video1
, Video2

BTHome uses BLE advertising to send sensor data to Home Assistant (uplink). Now I would like to play with "actuators" which needs downlink. I was thinking of:

• displaying data on a Pixl.js
  
• Toggling relays on Sonoff devices (running Espruino of course)
  
• doing PWM outputs
  
• ...
  I suspect in this case the best bet is to integrate EspruinoHub into Home Assistant. So far so good, except I have installed a Raspberry PI with Home Assistant OS and I don't have access to the RPi system to install EspruinoHub. (HA OS is running into a Docker and you don't have access outside of it, AFAIK)
  
  
  

Any ideas out there?