The tests are run with the flag --enable-features=SharedStorageAPI,FencedFrames:implementation_type/mparch,PrivacySandboxAdsAPIsOverride,SharedStorageSelectURLLimit
You can run these tests by targeting the following directory: virtual/shared-storage-selecturl-limit/external/wpt/shared-storage-selecturl-limit.
See crbug.com/1218540 and crbug.com/1405281.