Show a long running action status (running or not) in dashboard?

You could display all automations that are currently running in a markdown card:

type: markdown
content: >
  {{ states.automation | selectattr('attributes.current', 'gt', 0) |
  map(attribute='name') | join('\n') }}

or use something like this:
WTH cant I see which automations are “in-process” - Month of “What the heck?!” - Home Assistant Community

But, just as @finity wrote, neither approach will show you, though, which step the automation is currently at.