Getting multiple 6* FM is not that incommon. For unknown reasons, somes are way more common than others (and I guess it vary for each player). For example, I got 13 A nesting star but only one Forests, bridges, and pincer attacks. I have noticed the same for girls (I got only 3 Flamigo Plant and countless times some other girls). It's not impossible to get 5 Regrets and Kindness FM in one or two years. And you can spend 100 R-medals for one 6* FM Flower (not sure it's worth it). Or you can use it not fully unlock and still get 15% act again. Not the best but still great.

But maybe we will got THE perfect support for her in the future. Someone like x1.6 skill act or x2 skill act turn 1 and xx% act again for 1 guardian ally. Or even x1.5 skill act for 1 guardian or anything else.