That’s so great to hear and I’m glad that this wasn’t an impediment to your visa extension.
I am not sure but it might be good if some of our German collegues could give insight here (@LenaAllweiss, @Tassilo, @Greg).
My understanding is that both are very effective and indeed TDF is prescribed as a first line therapy here in Australia (with the option of changing to TAF if there are any side-effects or worries about kidney issues).