Didn’t explicitly say she lost her powers so my takeaway was they left it open ended. If someone wants to keep using Lana as Superwoman then they can. Otherwise you could easily say they went away and now she’s powerless again. I can’t see them keeping Lana as Superwoman, if they do we’re looking at a Superfamily of:
Clark
JHI
Kara
Kon
Kenan
Jon
Natasha
Osul
Otho
Lana
10 members is way too big. As it is currently everyone is not getting equal focus or development, I can’t see that improving by adding Lana permanently.