I don’t believe everything is supported on Prime for the 9800’s. If you take a look at templates as that is a good example. This is from the PI 3.8 guide
Catalyst 9800 Series Wireless Enhancements
Prime Infrastructure now allows you to manage the inventory and life cycle management of the new 11AX Access Point (Axel-9130 series) on Catalyst 9800 Series Wireless Controllers.
Prime Infrastructure now allows you to manage the inventory and life cycle management of the new IW3702 Access Point (Zephyr) on Catalyst 9800 Series Wireless Controllers.
Prime Infrastructure now allows you to manage the inventory and life cycle management of the new IOT Access Point (Duplo) on Catalyst 9800 Series Wireless Controllers.
Prime Infrastructure now allows you to manage BSS Coloring feature on Salt Spring and Vancouver Access Points (11AX) starting from 17.1 Catalyst 9800 Wireless Controllers except C9117 Access Point. You can enable this feature by selecting the BSS Color checkbox in the 11ax Parameters section.
Configuration > Wireless Technologies > Cisco Catalyst 9800 Configuration > WLAN Profile > Advanced-A new option, Allow Private Group, is added as a part of the Peer to Peer Blocking drop-down list.
-Scott
*** Please rate helpful posts ***