Musify, RiMusic, Harmony, alternative open a Spotify
There are some programs that replace Spotify allowing us to listen to music with youtube music bees, over time some projects have been abandoned here is a list of software still maintained and working.
WARNING!!! Over time developers could abandon projects or bees could become no longer working.

1. Musify
Let's start this list by talking about Musify, an application that allows us to search for our favorite singers or bands and listen with support for offline listening to songs, No ads, Sponsor Block, no required recording, lyrics support, translated into 17 languages and infine playlists to save to choose your favorite songs.
We can download the app directly from F-Droid

2. RiMusic
Features practically identical to Musify with the possibility of downloading songs or playlists directly on the mobile, and background changing colors, as for Musify listening to a song at the end we are offered the next similar in self-learning as for spotify.
Even RiMusic can be downloaded straight from F-Droid

3. Harmony
On the previous line, the third app we can install is called Harmony and apart from all the previous features it implements compatibility with android cars for those who use it (I strongly advise against using it for privacy reasons), implements audio equalizer, dynamic themes editable streaming quality to save data and more Harmony can also be downloaded from F-Droid.
Each of the apps described performs the function of a replacement of Spotify by relying on the music service of Youtube, also better to have more than one app installed for this purpose because the bees may no longer be working for an app or developers might abandon the project.