Is that picture what you want, or what you’ve found so far but does not meet your needs?
LoRaWAN was designed to have many devices use the same gateway(s). The only limitation might be the “downlink” that apparently needs to switch on/off some motor, in your picture. On the TTN Community network you can only have 10 of those per day (and in other LoRaWAN networks it’s also going to be very limited). And as it’s radio: it’s never guaranteed that data is received.