Direction and elevation

Mostly by car, I’m recording pictures for Mapillary with an Android smartphone and an external RTK receiver. On the smartphone, I use a first application that is getting RTK corrections from internet and is sending it to the RTK receiver. The RTK receiver is sending back position to the application. Using the " Mock Location" in Android developer options, the application is broadcasting the position to other applications including Mapillary.

But I can see that my pictures are always pointing East:

So, I copied all my pictures on a computer. Looking at exif, I discovered that direction is equal to 90° and elevation to 0 m.

I can understand that, with my setup, it is difficult to get picture direction but why did you removed on the website the option to align pictures to the track direction?

Why is elevation equal to 0?