Dolphin is the kde plasma file manager. Search up until now is very weird. Different search syntax when searching in indexed vs non indexed folders aswell as differences when folder is e.g. a network share (https://bugs.kde.org/show_bug.cgi?id=428950)
I personally use kfind when possible, because it works a lot better but ofc a good native search in file manager would be preferable
Looks cool but also like it still needs some development. Personally, I don’t need over the top slides but rather a good management sim. Wishlisted