Work around at the moment is to enter a valid search entry (“wa” and get the tag list to be shorter than the available screen height - keyboard height.
If I switch to the Apple keyboard (not my daily driver on iPhone) I can reproduce what you see. The keyboard obscures the last few lines, but I think different keyboards can actually obscure different amounts. If I tap the “done” key it dismisses the keyboard for me and I can then see the full set and scroll them just fine.