How i show React tables/API?

Question

Hi Guys i was trying to do and API From this video link https://www.youtube.com/watch?v=gpfP60KjmZU&t=2s , but it doesnt work for me i did exactly the same thing as this guy but in a new version i changed some things of course because the Switch is different in this version but when i run my API the tables dont show like in 47:25 in the video is just the blank page with the menus but is not appearing any tables if anyone can help me im new to react and im trying to make this register table work if anyone can help me i appreciatethis is what my page looks like this is how i need to look like,if anyone wants the print of the code im gonna put the tabs and ask me which one you want a and i send ask me the tab i click and i send the print i answer quickly