Cron list empty?

When I executed crontab -l it show nothing, empty list.
I recently updated nginx, curl, brotli but nothing of this should not touch crontab.
So I edited crontab -e and again put my personal crons, but what about crons which centmin add?
I list last 1000 crons, and I see that phpmyadmin has one cron, and if I remember, after centmin was installed, in crontab there was 1-3 added crons.
How to add that back?

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Also, another question, what is difference between this two command:
/usr/bin/chown -R nginx:nginx /home/nginx/domains
/usr/bin/chown -R nginx:nginx /home/nginx/domains/