Thank you very much for your hints.
On an earlier SFOS version I used https://together.jolla.com/question/209300/how-to-microg-in-sfos-31/?sort=votes&answer=209744#post-id-209744
to install microG.
I don’t know if this is also valid for 4.0.1.48?
In AlienDalvik-Control (9.3.1-1) on SFOS 4.0.1.48 there is no settings button. So I used
apkd-launcher com.android.settings
to check the settings and all looked good.
Now I found [3.4.0.24] Signature spoofing doesn't work on a freshly flashed xperia 10 plus where Sthocs explains the changing of /usr/sbin/alien-generate-properties.sh in line 133:
export XDG_CONFIG_HOME=/home/$ALIEN_USER/.config
I did this.
But after restarting aliendalvik the Spoofing Checker still vanishes after some seconds without giving any output. So it’s nor clear for me if it works or not.
Best regards, Uwe.