I think this is not possible because it is WebDAV and you need the authentication of a user.
But you can share all files in one share and configure the share link. It would then look like this:
Example shared folder
https://cloud.server.tld/index.php/s/EskdRyytYAMHdxG
photo Frog.jpg in top folder:
https://cloud.server.tld/index.php/s/EskdRyytYAMHdxG/download?path=&files=Frog.jpg
PDF “Nextcloud Manual.pdf” in top folder
https://cloud.server.tld/index.php/s/EskdRyytYAMHdxG/download?path=&files=Nextcloud%20Manual.pdf
PDF “Nextcloud flyer.pdf” in subfolder “Documents”:
https://cloud.server.tld/index.php/s/EskdRyytYAMHdxG/download?path=%2FDocuments&files=Nextcloud%20flyer.pdf