Determine if Incremental Refresh is enabled?

Hi All,

I've recently inherited responsibility for a group of dashboards from a previous employee (who left on bad terms). 

I want to ensure they're using the incremental refresh. Typically, I would just check the PBIX file in Desktop... but I don't have the PBIX files (again, bad terms). 

I tried to download them, but I can't due to "You can't download this file right now because it has been designated as a large model."

It is my understanding (but I may be wrong) that Large Model doesn't necessarily require incremental refresh, it's just a best practice.

So, is there any other way I can determine if these reports as using incremental refresh?

Thanks for your help!