after Android 11 my samsung M51

[Hitschavda]

After update it become little leggy while calling and search applications  

And I was thinking that with this update camera problem will be solved of front camera touch to focus and color changes problem doesn't fix not fixable may be samsung watch this issue. 

[Ehsank]

for camera;

Try these steps once and if not solved then send feedback as mentioned in last
1. open camera >Settings >reset settings
2. long press on camera icon >app info (ibutton) >storage >clear cache and data
3. You can send feedback to Samsung by using get help section
GetHelp>>SendFeedback>>ErrorReport/AskQuestion>choose appropriate section

[Hitschavda]

I tries it Ehsank but not done . wait see both colors orange is back camera and second from front cam

[Ehsank]

for lagging;

A. Wipe Cache Partition.
Steps to perform.
1) Turn off the device.

(Connect with type C cable/type C earphone only for Android 11)
OR
IF YOU HAVE ANOTHER MOBILE THEN CONNECT WITH CABLE WHETHER IT IS TYPE C TO TYPE C OR MICRO USB PORT take help of otg connector to connect other mobile.
2) Press and hold the Volume Up key and the spower button.
3) When the Android logo displays, release all keys.
4) Press the Volume down key to navigate and select "Wipe cache partition".
5) Press Power key to select. When the wipe cache partition is complete, Select Reboot System.
6) Press the Power key to restart the device.

And if still same issue persist then try these below steps;

B. Go to >Settings>General Management>Reset >Reset settings

C. Go to Settings >Apps> Tap on Top Right 3Dots and select Reset App preferences.

(NOTE : Reset settings/ Reset App preferences, change all settings to default)

[Nick95]

for lag, clear cache by method given by Ehsank
For camera HDR, report to Samsung along with poor ram management

[Samsung_Support1]

Dear Samsung Member,

Greetings from Samsung Customer Support!

Please perform the below mentioned steps to resolve the issue:

* Check app cache: Clear cache memory of a particular application : Setting >Apps >Now pick the app. For example 'Samsung Internet' >Storage >Clear Cache.

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support