Thank you for your help. I have no idea, what I have done, but it works! \o/
After struggling with npm and yarn, I finally made it.
I even made a deb-Package for an installation on arm64 and it worked!
I tried on my Raspi 400 with bullseye arm64, unfortunately microstudio doesn't start. The error is error while loading shared libraries: libasound.so.2: cannot open shared object file: no such file or directory.
Linking the library in /usr/lib/microstudio says wrong ELF class.
Maybe there is a way to compile this software to arm64?