I had the issue of not being able to use the plugin on mobile because of the box being too narrow.
By adding the following custom CSS into the .obsidian/snippets folder and enabling it in Settings > Appearance > CSS Snippets I was able to fix it and make it detect the screen's portrait mode.
I would recommend adding this to the plugin's styling as now it is perfectly usable on my 2400x1080 phone screen in portrait mode.
@media only screen and (orientation: portrait) {
.modal {
width: 100% !important;
max-width: 100%;
max-height: 100%;
}
}