@MantasD @CristinaGrancila Hey there!
Unfortunately - there is no feature to print invoices, also, in most cases, suppliers do not provide them.
However, there are many apps and extensions that can help you to generate those invoices.
You can find some awesome apps on Google and in Shopify app store.
Here's the link to Shopify app store: https://apps.shopify.com/search/query?utf8=%E2%9C%93&q=invoices
I'm sure you can find other great apps or extensions that can do the job for you!
Best of luck