What's wrong with the Celery setup, do periodic tasks not work?

Question

Django

On the local machine, periodic tasks were launched, as they began to transfer to the server, they fell off. Perhaps something because of the supervisor. celery itself works, asynchronous tasks are executed, but the scheduler does not execute regular tasks, I tried to run it as a separate worker.

Here is the celery startup script: start_celery.sh

#!/bin/bash
source /home/www/proj/core/venv/bin/activate
exec celery -A proj worker -l INFO -f /home/www/proj/core/logs/celery.tmp.log
 -B --scheduler django_celery_beat.schedulers:DatabaseScheduler

Here is the supervisor configuration:

[program:celery]
command=/home/www/proj/core/bin/start_celery.sh
directory=/home/www/proj/core
user=www
process_name=%(program_name)s
numprocs=1
autostart=true
autorestart=true
redirect_stderr=true

Here is the function to set periodic tasks, it is executed at startup:

@celery_app.on_after_finalize.connect
def setup_periodic_tasks(sender: celery_app, **kwargs):
  # Устанавливает регулярные задачи
  print("setup_periodic_tasks()")
  sender.add_periodic_task(
    crontab(hour=10),
    remind_notify.s()
  )
  sender.add_periodic_task(
    crontab(minute=1),
    check_mailings.s()
    )

But periodic tasks are not executed, there are no errors in the logs, the supervisor logs are also clean. When I call celery -A proj inspect scheduled, I get:

->  [email protected]: OK
    - empty -

1 node online.

The second day I'm fiddling around, I can't understand what's wrong, apparently I missed some trifle, maybe someone came across a similar jamb?