No tap focus on mobile phone – Imaging Edge Mobile Review

A very simple function was removed due to some camera lines updated. A7Riii&Riv can’t use this app to change focus. However, it used to be a convenient app on early products such as a7 and before. More historic thing is that new A1 can use this app to change focus while shooting. I have no idea about this issue. Is my a7r4a abandoned by Sony?
Review by 俗人阿鼎 on Imaging Edge Mobile.