Hi, I found In-App purchase feature is restricted even with User-based VPP.
I understand Device-based VPP does not accept In-App purchase, however User-based VPP accept In-App purchase. (It works on iOS 15 device actually.)
When I tried subscribe ChatGPT on iOS 26 device using User-based VPP, an error dialog is shown that explains In-App purchase is not allowed.
sysdiagnose shows logs belog:
情報	2025-10-26 23:58:22.350841 -0700	storekitd	[Client] (ChatGPT)  Initializing client
デフォルト	2025-10-26 23:58:22.353982 -0700	storekitd	[Client] (ChatGPT) Initialized with server Production bundle ID com.openai.chat and request bundle ID com.openai.chat]
デフォルト	2025-10-26 23:58:22.354020 -0700	storekitd	[CanMakePayments] In-app purchase disabled because app com.openai.chat has MID based SINF
In iOS 15 device, no storekitd logs are found and appstored and several processes seem to handle In-App purchase.
Does In-App purchase no longer work with User-based VPP?
Thank you.