Not possible to share with NextCloud App

Hi everyone,
I tried to share some folder with my IOS Nextcloud app. But when I touch the share button I can only choose the "Activity" tab. I cannot access the "Share" tab. I do not know if I lost the possibility or never had it.
With my Mac and the nextcloud App everything works fine and I can share.

Do others encounter the same problem? Could it be because I have 2 accounts linked in the app?

Thanks for your help!