the same as the top answer but this answer helps you find the url faster

search in console for -[MAAsset logAsset]: assetId:

then copy the "__BaseURL" and "__RelativePath"

"__BaseURL" = "https://updates.cdn-apple.com/2025/mobileassets/043-04469/1BBC5F79-9AE4-4B5B-B082-92AF42967D6E/";

"__RelativePath" = "com_apple_MobileAsset_iOSSimulatorRuntime/A5D7BEF2-F8FE-45DB-9986-0D938766809A.aar";

example of download url of iOS 18.2 (22C146) SDK + iOS 18.3.1 (22D8075) Simulator (Components absent)

then download link is https://updates.cdn-apple.com/2025/mobileassets/043-04469/1BBC5F79-9AE4-4B5B-B082-92AF42967D6E/com_apple_MobileAsset_iOSSimulatorRuntime/A5D7BEF2-F8FE-45DB-9986-0D938766809A.aar

the reason of typing a seperate answer that i dont have enough reputation to make a comment, so an upvote would help in future helping people in comments