iPad results exist for compositing/overflow/scrolling-content-clip-to-viewport.html:
> find LayoutTests -name 'scrolling-content-clip-to-viewport*'
LayoutTests/platform/mac-wk1/compositing/overflow/scrolling-content-clip-to-viewport-expected.txt
LayoutTests/platform/ios/compositing/overflow/scrolling-content-clip-to-viewport-expected.txt
LayoutTests/platform/ipad/compositing/overflow/scrolling-content-clip-to-viewport-expected.txt
LayoutTests/compositing/overflow/scrolling-content-clip-to-viewport.html
LayoutTests/compositing/overflow/scrolling-content-clip-to-viewport-expected.txt

But running with --ipad-simulator --reset-results doesn't update the result in platform/iPad:

> run-webkit-tests --ipad-simulator --reset-results compositing/overflow/scrolling-content-clip-to-viewport.html                                                                                                       
Using port 'ipad-simulator-monterey-wk2'
Test configuration: <, x86_64, debug>
Placing test results in /Volumes/Data/Development/system/webkit/OpenSource/WebKitBuild/Debug-iphonesimulator/layout-test-results
Using Debug build
Pixel tests disabled
Regular timeout: 30000, slow test timeout: 150000
Command line: /Volumes/Data/Development/system/webkit/OpenSource/WebKitBuild/Debug-iphonesimulator/WebKitTestRunnerApp.app -

Found 1 test; running 1, skipping 0.
                  
Verbose baseline search path: platform/ipad-(5th generation)-simulator-15-wk2 -> platform/ipad-(5th generation)-simulator-15 -> platform/ipad-(5th generation)-simulator-wk2 -> platform/ipad-(5th generation)-simulator -> platform/ipad-simulator-15-wk2 -> platform/ipad-simulator-15 -> platform/ipad-simulator-wk2 -> platform/ipad-simulator -> platform/ios-simulator-15-wk2 -> platform/ios-simulator-15 -> platform/ios-simulator-wk2 -> platform/ios-simulator -> platform/ipad-(5th generation)-15-wk2 -> platform/ipad-(5th generation)-15 -> platform/ipad-(5th generation)-wk2 -> platform/ipad-(5th generation) -> platform/ipad-15-wk2 -> platform/ipad-15 -> platform/ipad-wk2 -> platform/ipad -> platform/ios-15-wk2 -> platform/ios-15 -> platform/ios-wk2 -> platform/ios -> platform/wk2 -> generic

Baseline search path: platform/ios-simulator-wk2 -> platform/ios-simulator -> platform/ipad -> platform/ios-15 -> platform/ios-wk2 -> platform/ios -> platform/wk2 -> generic

Running 1 test for iPad (5th generation) running iOS 15

Running 1 WebKitTestRunnerApp.app.

Writing new expected result "platform/ios/compositing/overflow/scrolling-content-clip-to-viewport-expected.txt"