FNCtableview focus error

Seems you continue with errors on iOS, the same mistakes from FMX UI Pack now it's on FNC UI Pack.

https://timbralofacil.com/descargas/errortms4.mp4

¿Do you really solve the iOS troubles

Please check which control has focus, as the error clearly indicates there is a control that wants focus and does not get or have focus at the time of rotation. You can do that, by dropping a timer, and check the ActiveControl property. If the control has focus and you have destroyed the window, then the control should be removed as ActiveControl from the form to solve the issue. Note that the tableview does not handle this automatically.

FMXTableView has an area to "search" phrases in order to filter specific items, does the FNCTableView has the same search area?

Thanks

Yes, you can use Interaction.ShowFilterButton or immediately show the filter with TMSFNCTableView1.StartFiltering;