Looks like so many women's matches where with fairly level opponents most games are pretty even with the serve more a point starter than any particular advantage.
Often like here, with a bit of running, set scores can seem misleadingly one sided and it just needs a bit of change of momentum and the other player winning rather than losing the tight games to have a big turnaround in games and often some rather inaccurate references to 'collapse'.
Anyway, in this case, hopefully Amanda can keep her nose in front and to me that's much more what matters rather than whether games won are service or return games. Just win more, Amanda.