magento2.3 – New order email notification not send

Magento 2.3.3
When registering a new user, a message is sent to the mail. If the user creates an order or tries to send from the admin, there is no message.
I tried to install Mageplaza SMTP, test emails come, but no ordering emails.
How to identify the error?
I try disable all third-part modules, try DB with fresh install, same error.