When a smaller Atmos speaker is present using a high crossover, the lower frequencies will be sent to any subwoofers connected to the sub pre outs of a given AVP/AVR along with the signals in the LFE channel.
If one is connecting multiple subwoofers to an AVP/AVR using speaker terminals or pre outs to Line In ports and setting all channels in the AVP/AVR to Large/Full Band, the subwoofers had better be equipped with HPF or the full range signal will be passed along to any speaker connected through it and lesser speakers will be damaged.