You can easily do that by checking Required checkbox next to a phone number field, under Form Fields page in LatePoint admin.
It’s not possible natively, but what you can do is have a workaround by creating a category for your service, for example “Massage”, and then inside of it you will have multiple services with different durations and pricing, like “Massage 1 hour”, “Massage 2 hours” etc… Then in “Settings -> Steps” you check “Show Service […]
You can add selected_agent=”any” to booking button or form shortcode, so it will look like this: Alternatively, if you want to preselect a specific agent, you can set selected_agent attribute to the ID of that agent. Learn more by clicking here