
Hi @Andy ,
In SharePoint 2019 environment, when multiple files are selected in the document library with modern experience, then there is no download option. It is by design.
Here are steps to download multiple files at one time in sharepoint 2019:
- First switch the document library to classic mode:Library setting->Advanced settings->Classic experience
- Download multiple files from SharePoint 2019 document library by using "Open With Explorer" and it only works in IE.
Reference: https://support.microsoft.com/en-us/office/copy-or-move-library-files-by-using-open-with-explorer-aaee7bfb-e2a1-42ee-8fc0-bcc0754f04d2
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