Multiple products sharing same calendar?

Hypothetical setup: Let’s say I offer music lessons.

I have a page on my website about piano lessons, and a calendar so people can book a one-hour session. There’s a list of extras where a selection is required.

But now, let’s say I want a DIFFERENT page on my website for guitar lessons, that has its own separate list of extras.

I don’t need a second calendar, because bookings come from the same pool of my available hours.

And if I add a third page for VOICE lessons, I’ll need extras for that page as well.

How do I achieve that?