I improved local assets plugin, but I couldn’t put it in the assets folder.
I don’t think can do that with plugin due to limitations.
This is an issue that needs to be addressed by Logseq developers.
I created a plugin to achieve that. I have published Multiple Files into Assets plugin on the Logseq Marketplace. However, it has a drawback. Due to security concerns, it saves files not in the assets/ folder, but in the assets/storages/logseq-plugin-multiple-assets/ folder. To resolve this, I believe it would be necessary to implement the functionality within the core Logseq application.