Convert link to to audio block, or transform embed block to audio block

I am currently having to convert a whole load of pages/posts to block editor.

The problem is that what were previously audio links e.g. https://examplesite.com/audiofile.mp3 get converted to embed blocks, but I want them as audio blocks.

So either (ideally) I need to find away to make a link convert directly to audio block when I switch from classic to block, or else easily change the type of block afterwards.

But if I go to the top left of the embed block to change the type, there is no option to change it to audio.

So, does anyone know how I automaticaly convert audio links to audio block or change an embed block to an audio block?

Thanks