Flutter App (Android Studio), a small application, with 3 screens and 3 tables. Database on the mobile. (no firebase)

It is about, for a small application, with 3 screens and 3 tables. Database on the mobile. (no firebase)
The only complication is that when entering data in the first table (TABLE_A) the list from the second table (TABLE_B) must also be displayed, which the user will be able to change order. User options will be entered in the third table (TABLE_B_IN_TABLE_A)

The tables are as follows

TABLE_A
ID
Title

TABLE_B
ID
Title
Color
Icon

TABLE_B_IN_TABLE_A
ID
table_A_ID
table_B_ID
OrderIndex
Visible

We want legible flutter code, with specific "pubspec.yaml", which will run in Android Studio.

More information, with expression of interest.