I want to grep nonascii characters from a lot of .gz files. However the below does not work on CentOS 7.6 (GNU grep v2.20)

$ zcat yyyy/yyyymmdd/filname.yyyymmdd.gz | grep --color='auto' -P -n "[\x80-\xFF]"$ zgrep --color='auto' -P -n "[\x80-\xFF]" yyyy/yyyymmdd/filname.yyyymmdd.gz

This perl search work

$ zcat yyyy/yyyymmdd/filname.yyyymmdd.gz | perl -ne 'print "$. $_" if m/[\x80-\xFF]/'

But how do I do it on mulitple files like the following?

$ zgrep "[\x80-\xFF]"  2020/2020*/filename.2020*.gz

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