Need to calibrate the compass everywhere you go, and do it while keeping the Seestar unit as level as
possible while rotating it (takes longer to calibrate, but is more accurate).
The better way to find the sun though is to 3d print (or have printed) a solar/sun finder.
You just plop it down on top of the moving part of the Seestar unit, rest its side against the stationary part, and then manually move the scope within the app until the little dot of sunlight is centered in the circular target. At that point the sun will also be in frame and you can enable the auto tracking.
There is also a way to do it using the little hole on the handle of the solar filter when it's sticking straight out to the side, but it's a little fussier process. You're looking for the sun coming through that hole to cast a little ray of light along the side of the scope. Can make an alignment mark for vertical.