Hey there rjs3,
How are you doing today?
In order to render calendar for specific service you can use service attribute in app_monthly_schedule shortcode, something like this:
[app_monthly_schedule service="2"]
where 2 is the ID of the service, you can check service ID in Appointments -> Settings -> Services, see screenshot https://screencast.com/t/72crIT3qrbP9.
If you’re going to do this make sure to remove [app_services] shortcode from that page as it is not really needed.
As for showing other 2 services in a dropdown on another page there is no way out of a box using shortcodes to select these two so what you can do is simply use CSS to hide that option.
So for example we can target that page specifically and hide one of the options by their order, something like this:
.page-id-22 select#app_select_services option:nth-child(2) {
display: none;
}
If you want me to help you with that I’ll need link to your site where I can see this page.
Best regards,
Bojan