@Sky3RN you mean, copy to the clipboard, right? if you browse through the options in the share sheet, isn’t there any option to copy to the clipboard? the set of options that appears depends directly from the device, apps and vendor.
About the downloaded files, files are really downloaded and stored in your device inside the Scoped Storage. This is a Google requirement since Nov’21. If you are interested about it, please take a look to the following entry: ownCloud 2.19 for Android