Awesome! That’s actually very easy to accomplish: you need to get the value from HomeAssistant with Jinja templates. It will update your card with the new state whenever your entities updates. e.g.:
<input
type="range"
class="range range-accent"
min="0" max="100"
value={{ states('input_number.test') }}
onChange="hass.callService('input_number', 'set_value', { entity_id: 'input_number.test', value: this.value })"
/>