Yes, you can still use the RFID and/or the TNG Card feature.
However, to reload the Touch ‘n Go eWallet, you will need to log in to your Touch ‘n Go eWallet account using a non- jailbroken/rooted device.
Below are the articles that may be useful for you :
Why is the Touch ‘n Go eWallet app not supported on jailbroken / rooted devices?
Can I log in to my Touch ‘n Go eWallet account using another device that is not jailbroken / rooted?
If I log in to my Touch 'n Go eWallet account using a jailbroken / rooted device, will my Touch 'n Go eWallet account be suspended?