User Activity

When will S23 lineup receive the update of 8.5?
Sunrise 
From Morning 8am to 2pm afternoon. When I bought this phone I use to get almost full day of use but now only half day of use.
My S23 Ultra battery life is getting worse, If i charged in the morning to 90% at around 1pm battery drained to 18% only i am using WhatsApp and phone calls.Any suggestions?
Since i update to ONE UI 7i noticed the battery drain so fast. My S 23 ultra used to last almost full day but now it doesn't go all the way it end of the day.