I encountered this as well as i wanted to make some styling and alignment consistent with the buttons and the login required text. Here is some code that should be able to move the Login & Signup buttons inside that div if needed. Probably better ways to do it, but adapted it from this theme component for customizing private login page .
<script type="text/discourse-plugin" version="0.8">
const { on, observes } = require('ember-addons/ember-computed-decorators');
api.modifyClass('controller:static', {
@on('init')
@observes('model.path')
setupVideo() {
const path = this.get("model.path");
if (path === "login") {
Ember.run.scheduleOnce('afterRender', () =>{
let login_div = $('.login-required')[0];
let signup_btn_element = $('[aria-label="Sign Up"]')[0];
let login_btn_element = $('[aria-label="Log In"]')[0];
login_div.appendChild(signup_btn_element);
login_div.appendChild(login_btn_element);
});
}
}
});