So while I was trying to import a .zip file from planet Minecraft, I followed all the instructions to turn it into .mcpack. While I did that, I imported it to Minecraft and an error with no log comes up. .mcworld works but not .mcpack.
Note: I use iPadOS v.13.6 using a iPad Pro (9.6 inch) model. I don’t know if that will help.
Normally you would just rename the bar.zip to bar.mcworld, however it wouldn't matter anyway because imports are currently broken on iOS and must be done via direct sharing with another app (not Safari or Files).