It seems odd to me that the only option to view the changelog is to locate it buried in the source code, and not see it readily displayed here in the Development tab (as is standard practice with other plugins).
I will also say that, looking at the changelog, some of it is meaningless to me as a drag-and-drop developer, and not someone who does much coding. For example, I do not know what “QIT changes” are (it would be helpful if the acronym “QIT” was defined at least once in the changelog, but it isn’t).
Further back in the changelog, it says “Fixed – Security issues” a couple of times. While fixing security issues is good, I think the changelog should provide more detail about what, exactly, was fixed. For example, the WooCommerce changelog includes a sentence describing each security fix, which is often accompanied by links to pages with further info.
That aside, the main takeaway from the changelog for me is that the plugin has not been tested with WordPress 6.6.1 (it only says “Updated – WordPress compatibility to 6.5.4”). As for WooCommerce, the Printful changelog says “compatibility to 8.9.3”. So, are there any problems with running the Printful plugin in conjunction with WooCommerce 9.1.4 (latest version)?