Minecraft deleted on the iPad now all worlds are gone what can I do to get them back?

I had Minecraft on the iPad and it didn't work, then I deleted it and when I downloaded it again, all my worlds were gone (123), which meant a lot to me. Can I repeat these worlds Please give me tips!

If you don't have a backup from your iPad, that won't be possible

Since you have not saved the worlds before, they are unfortunately gone. They were deleted with the deinstallation.