my question is I have fully approved AdSense account so can i use same adsense for Admob or i want create separate Admob account
Admob is a part of AdSense.
So, If you want to create a new admob(adsense) account then you can’t do it on same payee details.
You can freely use your previous admob linked adsense account.
Bro can i use my adsense codes to display ads on my app?
Web & Android both are different platforms.
integrate android sdk with admob pub id to show ads in mobile app.
AdSense codes will not show any ads on mobile apps.
I would recommend Dont use.
I have done it with YouTube channel and still feel regret for that mistake.
Actually you can sign up with same account details.
But create a different account using your family member name.