the problem of the button on mobile phone

hi, how are you
everything is good on desktop
but when checking them on the mobile phone, the layout of the button will be out of the order
https://prnt.sc/suvw5j
https://prnt.sc/suvwb5
how to change that for good layout

another one: how to make it the center of the top bar for https://prnt.sc/suw2yr?
third one: here i m using wp show posts plugin, please check the screenshot -https://prnt.sc/suw3vs
I think the image is too big, how to set up a normal size for the image,
There is no gap on the left (positon 2) when i choose the Set Full Width Content for layout, it will be good if there is little gap on the left, also the image size is little smaller. how to change them?

thanks in advance