How to create pages inside pages?

I am new to streamlit and found it very nice for reporting . My client wants me to make a report, now there is a challenge where i have to create pages inside pages ( to be more clear please have a look a gif)

what is expected from a client


what i could deliver

please help me :slight_smile: Thanks

what I exactly want

./Forex/Forex Date From
./Forex/Upload Files

Thanks :smiley: