See https://wpt.fyi/results/css/css-sizing/contain-intrinsic-size/auto-007.html?label=experimental&label=master&aligned Safari fails 26 out of 42 test cases even though the test expectation checked into WebKit says we pass them: https://github.com/WebKit/WebKit/blob/main/LayoutTests/imported/w3c/web-platform-tests/css/css-sizing/contain-intrinsic-size/auto-007-expected.txt
These will start passing when content-visibility is enabled in shipping configuration.