So you thought your keyboard was broken because the following keys like I, O, K and L don’t work. Easy fix, just pair up another keyboard. Wait, the same keys are broken with this keyboard
What’s going on? Simply solution. Hit the OPTION key 5 Times.
https://www.macworld.com/article/3323387/you-mac-wont-type-u-i-o-j-k-l-and-m-heres-why.html