I’m using the secondary_info option for this kind of thing, might work for you as well:
- title: Charts
icon: mdi:chart-line
id: stats
cards:
- type: entities
title: Pump Plug Info (always on)
entities:
- entity: sensor.tp_link1_volts
secondary_info: last-changed
- entity: sensor.tp_link1_amps
secondary_info: last-changed
- entity: sensor.tp_link1_cwatts
secondary_info: last-changed
- entity: sensor.tp_link1_dwatts
secondary_info: last-changed
- entity: sensor.tp_link1_twatts
secondary_info: last-changed

But there’s also a custom entity-attributes-card: