I have the latest version of iOS, 15.1.1 and still do not have a "remove from playlist" or "edit" option available from any of the menus in my library which is sad because those are basic CRUD operations. The entire purpose of a playlist is to customize your songs and albums yet I'm not able to do that in 2021 (almost 2022) on an iPhone 12 plus that is more than a grand.
Whenever I download an album from apple music or sync my Shazam to apple music, the downloaded content is added to my albums and to my playlist. Why would they default add EVERYTHING to your playlist folder? Anyhow, I learned the painful lesson that removing an album actually deletes it from the library on my phone. At this stage in the technology game I should be able to perform all functions I need on my device, not have to deal with iTunes or whatever on my laptop especially with cloud capabilities.
I leave everything as is because Apple is so restrictive with customizations. I appreciate that iOS is not open source which means we have superior security to competitors but they need to redesign and understand the basic use cases.