Hi thistly,
welcome to this Appe (user-to-usr) Community!
Re: "Apple Arcade games missing from Assistive Access since iOS 26 : Once upgraded to 26 (26.0, 26.0.1, 26.1), Apple Arcade games (i.e. games with "+" suffix) do not appear when using Assistive Access."
Seems you had access to Arcade games in Assistive Access, prior to to the update, and now they are missing. Am no expert in this area, yet your post to the community deserves some response.
Wondering whether the linked article below can help with adding Arcade games back into Assistive Access:
See how to: Add, remove, and customize apps for Assistive Access on iPhone - Apple Support
Eg: says:
"Add or remove apps for Assistive Access
- Exit Assistive Access if it’s active.
- Go to the Settings app
. - Tap Accessibility, then tap Assistive Access.
- Tap Manage Apps.
- Do any of the following:
- Add an app: Tap
next to the app, then choose options for the app. - Remove an app: Tap
next to the app, then tap Remove. - Change the order of apps on the Home Screen: Touch and hold
next to an app, then move it to a new location in the list.
Note: You can’t add the App Store to Assistive Access. To get new apps from the App Store, you need to exit Assistive Accessif it’s active. See Get apps in the App Store in the iPhone User Guide."
Resource for iOS 26:
Assistive Access User Guide - Apple Support
All the best :-)