In my Samsung A7 2018 I'm unable to see WhatsApp images which I have received and sent to other person in not visible to my Gallery .How it will come to my Gallery

After the update on pie Galaxy A7 2018 camera quality is so different .I saw better picture Quality on oreo Is that anyone else who facing Same issue?

I don't know why my whatapp images and WhatsApp video is not Showing in my Gallery can anyone tell about that ?

Whenever I tried to Download apps or update my apps in Samsung A7 first It's downloaded then again it's start Downloading I don't know what's happening I also restart my phone many times but same problems is happend

Samsung A7 battery backup is too bad I had charge my phone 100% but after continuously use of internet after 5 hours it's battery drain so quicly and reach 19% I never expect that Samsung gives these type of quality in battery