Paypal is country specific so if you move countries you have to open another paypal account in the country you reside in and add an address / phone number / bank accounts / cards from within that country.
You should really withdraw any funds / resolve issues / remove cards and bank accounts before you move countries. If you don't then you may have problems doing so once you have moved and may need to contact customer services for help to resolve things.
Also you can't add a local bank account in Nepal. You can only link a card.
The option to 'receive' paypal payments is sadly not available in Nepal. You can only 'send' payments for purchases.
Paypal varies a lot country to country and can only offer the services that the banks / governments of that country allow it to offer. There are quite a few countries unable to receive paypal payments.