Before the reboot, all mail was sent, and everything that was scheduled after the reboot was sent at night, when I answered you on the forum.
This can be seen from the history, see the screenshot.
You rebooted the server while the minute cron was running. The cron was started at 20:36, the server got up after a reboot at 20:39.
All this is visible on your server.
Didn't send at 7am because you, or not you, rebooted the server at night.
reboot system boot 3.10.0-957.el7.x Fri Nov 19 02:56:31 2021 - Fri Nov 19 10:55:49 2021 (07:59)
reboot system boot 3.10.0-957.el7.x Fri Nov 19 02:52:01 2021 - Fri Nov 19 10:55:49 2021 (08:03)
This is your server and you can do whatever you want with the server (configure, reboot...), but you are also responsible for all actions.
All sent nowhttps://box.esmile.com.ua/admin/report/massemailsend/