In Shell scripting, how do you separate the grep and egrep?

Unix - Interview Questions

egrep is an extended version of grep, in addition to searching using regular expressions, egrep can use extended regular expressions for searching.

$ ls | grep '.env|.json'?

This will check whether any file has extension ‘.env|.json’ literally

$ ls | egrep '.env|.json'?

But in this case, it checks whether any file has extension ‘.env’ or ‘.json’ since ‘|’ this will be considered as a metacharacter.