@Exellent As far as I know the Trigorilla 0.0.2 doesn't support different operation modes for drivers, at least that's what I read online. So I did as I read and simply put them in, dialed in the correct voltage, switched the dir_pin in the config and that's it.
I ordered these. https://de.aliexpress.com/item/1005004582711693.html I only read later about quality issues and that there indeed are different kinds of 2209 drivers out there. So I expect this to be the cause; pretty frustrated right now, I hate my lack of exp.