fix(ios): missing cancel button when using popover action sheet (running on iPad or with SDK26 on iPhone)

[mlisikbf]

Summary:

Fixes #55074 by reverting to UIAlertActionStyleDefault for iPad action sheet and iOS26 action sheet (meaning app was built with SDK26, is running on iOS26, and without UIDesignRequiresCompatibility enabled).

Changelog:

[IOS] [FIXED] - ActionSheet: prevent cancelButtonIndex from causing buttons to disappear when using popover action sheet

Test Plan:

Used https://github.com/mlisikbf/MobileTest_ActionSheet/tree/test-patch as a starting point. It has the change applied via patch-package, and uses action sheets with/without an anchor, and with/without cancelButtonIndex. Scenarios to test:

built with SDK26, running iOS26

Simulator.Screen.Recording.-.iPad.A16.-.2026-01-07.at.13.58.01.mov

Simulator.Screen.Recording.-.iPhone.17.Pro.-.2026-01-07.at.14.02.45.mov

built with SDK26, running iOS18

Simulator.Screen.Recording.-.iPad.mini.6th.generation.-.2026-01-07.at.14.25.21.mov

Simulator.Screen.Recording.-.iPhone.16.iOS.18.-.2026-01-07.at.14.25.09.mov

built with SDK 18, running iOS26

(cannot install older build tools atm, but this will be the same case as UIDesignRequiresCompatibility below)

built with SDK26, running iOS26 with `UIDesignRequiresCompatibility`

Simulator.Screen.Recording.-.iPad.A16.-.2026-01-07.at.14.51.33.mov

Simulator.Screen.Recording.-.iPhone.17.Pro.-.2026-01-07.at.14.53.47.mov

[meta-cla]

Hi @mlisikbf!

Thank you for your pull request and welcome to our community.

Action Required

In order to merge any pull request (code, docs, etc.), we require contributors to sign our Contributor License Agreement, and we don't seem to have one on file for you.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[cipolleschi]

Thanks for fixing this issue!

[meta-codesync]

@cipolleschi has imported this pull request. If you are a Meta employee, you can view this in D90257007.

[mlisikbf]

For whatever reason, I am unable to reproduce today with the reproducer and a new, fresh project (both on latest RN). Will convert this to draft and continue testing.