Helper

Helper for remaining time dishwasher:
{{as_local(as_datetime(states('sensor.siemens_sn758x46te_68a40e40caf6_bsh_common_option_remainingprogramtime'))) | as_datetime | as_timestamp | timestamp_custom('%H:%M')}}

Helper for remaining time dryer:
{% set sensor1_time = as_local(as_datetime(states('sensor.siemens_wt7yh701_68a40e2a760e_bsh_common_option_remainingprogramtime'))) %}
{% set sensor2_value = states('sensor.siemens_wt7yh701_68a40e2a760e_laundrycare_dryer_option_wrinkleguard') %}
{% set minutes_to_add = (sensor2_value | regex_findall_index('(\d+)') | int) if sensor2_value != 'off' else 0 %}
{{ (sensor1_time + timedelta(minutes=minutes_to_add)) | as_timestamp | timestamp_custom('%H:%M') }}

Helper for remaining time washing machine:
{{as_local(as_datetime(states('sensor.siemens_wm14ve43_68a40e726c66_bsh_common_option_remainingprogramtime'))) | as_datetime | as_timestamp | timestamp_custom('%H:%M')}}