Idle consumption is the same as LineageOs18, and that is OK,
Roughly 11 Percent points a day when idle, and with WiFi on. So roughly ½ % per hour
In the below it was charged during the upgrade, and charged shortly before being laid (practically) idle for the last 1½ day.
(don't get confused by the slightly curved shape around 30% on 18.1 - the percentages are estimates, not accurate measurements)