ios drop file wrong file name

I use the following simple JS code to drag file from the browser to the desktop.

Works perfect on MacOS.

onDragStart(event, ucpView) {

let file = new BrowserFile([this.file.fileContent], this.file.displayName, {

type: 'application/ucp-scenario'

});

const fileURL = URL.createObjectURL(file);

event.dataTransfer.setData("DownloadURL", `application/octet-stream:${file.name}:${fileURL}`);

event.dataTransfer.setData("text/uri-list", fileURL);

}

but on iOS it keeps nameing the file

Text1.txt

Text2.txt

...

and ignores the DownloadURL

whats the best way to get it workng on both OS?