1-We are using a custom plugin to render the phone auth field which is not supported to go back.
2-Added the filter at our end so you can use pre-added country code like this
http://prntscr.com/1172ju5
3- We already added a restriction on the phone auth click button shows if the user adds a valid phone no. then it will show.
4- For the right to the left issue I have to check at your end
please share the admin credential with the site URL.
5- You can also add you css on this
http://prntscr.com/1172r5r
.vibebp_phoneauth_form_wrapper {
border: 1px solid var(--border);
background: var(--white);
padding :1.5rem;
}