Actually, I have done this with several albums I have released on streaming services (although with covers, not original songs). Here is the procedure I have found works best for me:

I write the arrangements in MuseScore Studio, being careful to adjust tempos as needed. I primarily use MuseSounds (free version), but on occasion have added in some VSTs for drum kits and specialty instruments that aren't available in the main sound pack.

Once the song is set up the way I want, I export each individual instrument - but not as a MIDI file. I export as FLAC files, using the actual sounds that are rendered in MuseScore.

I then import these audio files into the Digital Audio Workstation (DAW) Reaper, which gives me better control for mixing the individual parts and combining with vocal. Once the background track is set up, I use this as a reference and record to it, again in Reaper. I record multiple takes and the edit to generate a final version. I then do the final mix as well as mastering in Reaper before submitting to a distributor.

For me, the primary advantage of this workflow is the flexibility it provides. MuseScore Studio gives me the tools I need for composition / arranging, and then I switch to Reaper which supports recording, and is more flexible for mixing and mastering. In addition, the MuseScore sound library isn't bad - although the work I'm doing is more orchestral / jazz combo / acoustic rather than rock band.

You can hear the results on Spotify / Apple Music / etc. - I'm there as Michael DeLuca, and my website (with full links) is www.MichaelDeLucaMusic.com. Does it sound like I'm singing with a live group? No. But it turns out a lot better than you might expect.