Not seeing Lux sensors with the new statistics card

I’ve been playing around with the new statistics card and managed to get most things working. Some of my esphome devices needed “state_class: measurement” to be added before the entities became available, but that’s all sorted. One thing I’m stuck with is a couple of Lux sensors which I can’t get to show up as being available for use with the long term statistics. As far as I can tell, the entities meat the required criteria. Developer Tools - states shows this

state_class: measurement
unit_of_measurement: lx
friendly_name: Hall LUX
device_class: illuminance  

Which looks OK to me but maybe there is something that I haven’t spotted?

The devices in question are TSL2561 i2c and configured in esphome thus:

i2c:
  sda: D2
  scl: D1
  scan: false
  #id: bus_a

sensor:
  - platform: tsl2561
    name: "Study LUX"
    address: 0x39
    update_interval: 60s 

They are working just fine - I just can’t fathom out how to make them available as entities for the new statistics card. I know that illuminance is a supported sensor type because the home assistant blog shows an example of the statistic card showing two lux sensors. Any help would be much appreciated.