If you chose to use the SD card as Internal Storage (not as external/portable storage), then most probably this is not a question of /e/ or LineageOS (or Fairphone OS).
Since Android 10 there is more trouble than there was already all the time in Android with SD cards as Internal Storage. To use this setup can’t be discouraged strongly enough.
/e/ are about to remove this functionality for new installs until they have an idea how to handle this … Week 31 : Development and Testing Updates.