Samsung A7 2018 Freeze After Update Android 10

If you find any issues after updating your phone, you need to do a wipe cache from recovery mode.

https://youtu.be/dvFgnAlK3hU

If you updated the Android version of number 9 to number 10, you must doing factory reset

Thank you for contacting Samsung KSA 

dear you can try to wipe cache from the recovery mode it may help also quick optimization 

The Quick Optimization feature improves your phone's performance by identifying apps that use excessive battery power. It 

also clears away unneeded items from memory, deletes unnecessary files, and closes apps

running in the background. Optimizing your phone is quick and simple.

From Settings, swipe to and tap Device care. Tap Optimize now, and then tap Done.

restart your device in the safe mode too 

Hope you and your family staying healthy and safe!