The new major update iOS 13 comes with a lot features. In Files App we are able to compress and decompress files. It is much closer to how Finder works on Mac, to open Rar or 7Z files you still need a third party app to perform operations, but you can compress files into Zip format.
Here how to compress the files in Zip Format?
Step 1: To create a Zip file, Open Files App and Put all files in a folder those you want to compress in Zip.
Step 2: Now Select the folder you want to compress.
Step 3: Now top on Three Dot icon, at the bottom right corner, and tap on Compress option, and here you go, the file processing will began, the compressed file will appear with the same name and you can rename it, or can share it with anyone.
Here How to unzip a compressed file in iPhone & iPad?
Step 1: First open the folder, where your compressed file is.
Step 2: Now tap on the compressed file, now the content of the file will be automatically extracted to a folder with the same name.
Step 3: Also you can tap and hold the file, and then tap on Uncompress.