@harvey186, elsewhere here in the forum I just read that microG cannot be updated manually, only via /e/ OS Update.
My theory is: If I download microG directly from → Servies Core apk file (→ com.google.android.gms-19420020.apk) and rename this file to GmsCore.apk and replace this “old” GmsCore.apk with the “new” GmsCore.apk in /e/ phone (→ /system/priv-app/GmsCore/GmsCore.apk).
Is the /e/ OS system then also “updated” with this procedure or are important components missing?