How do I make my HD account a read Only acccount so know one can send from it, seems like anyone who has access to my phone has access to my bank... Only thing separating them is a  simple pin just does not seem safe.

I liked it when I had my old account and Id have to scan the QR code if I was to send from my  physical SAFE account, the only way you had access was from this priv key qr code which ONLY was available from MY SAFFE (MY BANK) Now its differemt I have my bakcup in a safe but what about my walllet I wanna review nbut have no sneed oprio