You could map a different HVAC Home Assistant value to your Eco or confort. Probably it is not the best thing to view, but it should work.
In example:
# ACS Example Climate
- name: "ACS Example"
unique_id: "fc_acs_example"
device_address: 100
scan_interval: 32
input_type: depending on your system
address: your address for current temp
precision: 1
scale: 0.01
hvac_mode_register:
address: your reg for hvac
write_registers: depending on your system
values:
state_off: depending on your system
state_heat: depending on your system
state_auto: depending on your system -> this could be your eco
state_heatcool: depending on your system -> this could your confort
write_registers: depending on your system
hvac_onoff_register: reg, depending on your system
max_temp: 35
min_temp: 15
temp_step: 1
target_temp_register: [REG_AUTO, REG_COOL, REG_DRY, REG_FAN, REG_HEAT, REG_HEAT_COOL, REG_OFF]
target_temp_write_registers: depending on your system
fan_mode_register:
address: reg, depending on your system
values:
state_fan_off: depending on your system
state_fan_low: depending on your system
state_fan_medium: depending on your system
state_fan_high: depending on your system