Raspberry Pi 4, running the latest software, after a cold boot everything should populate normally.
Actual Behaviour:
After a cold boot the Total queries and Client activity dashboards do not populate at all not even 5 days later. sometimes another boot helps, but it comes back.
Did you check your RPi's timezone settings as well as its time?
To adjust your timezone as required, run sudo raspi-config and choose Localisation Options | Change Time Zone.
You can also set your timezone manually via CLI, e.g.:
sudo timedatectl set-timezone Australia/Sydney
You may find your timezone with a command like timedatectl list-timezones | grep Australia.
If time is still off by too much then, you may set your time manually, e.g. by