Sub playlist with header in existing event playlist

Hi developers,

In 2023 there was a simular request, but unfortunately never implemented in a future release.

I would love to have the option to insert sub-playlists with a customizable header name (and maybe color) in an existing playlist.

I make a playlist for every event, but all my tracks are sorted by bpm / name or whatever, but I would love to make sub-playlists with a certain style of music so I can quickly scroll thru my playlist and find certain tracks for a certain mood on the dancefloor. 

Please consider this in a feature release. Thank you!