Do you created the utility meters entities (sensors) for the two sensors you want (in m3 and Kwh) in the dashboard ? Here is an example from my config:
This one is coming from utility_meter.yaml:
#
# Utility Meter Gaz Courcelles
#
gaz_courcelles_consumption_hourly:
source: sensor.smappee_usage_gaz_c_m3
name: Consommation Gaz (m3/heure)
delta_values: true
cycle: hourly
where the sensor.smappee_usage_gaz_c_m3 is created like this:
This one is coming from template.yaml:
- name: "Smappee Usage Gaz C m3"
state_class: measurement
device_class: gas
unit_of_measurement: "m³"
state: >
{{ states('sensor.smappee_usage_gaz_c_litres') | float(default=0) / 1000.0 | round(3) }}
I do the same for the kwh but first I have to convert the m3 measured on regular basis to watt and than kwh…