Hi,
I´m unsure how you identified that there are no approaches for ZSPD. I have tested it with the stock ZSPD in MSFS 2024 plus our AIRAC 2501 rev.1, and I see all approaches, and I can also select all approaches.
Here are two screenshots from the Garmin device in MSFS 2024:
Sorry, we offer the approaches, and as you can see, you can select them as expected.
Cheers,
Richard