Hi
I think that there is already a way to differentiate platform when deploying AC from WebLaunch on the ASA (assuming that the client has not already any AC version installed).
You can bind a regex value condition with each AC package activated on the ASA.
This regex is parsed agains the user-agent value of the navigator. It is not totally reliable but it usually works correctly (and for years on my corporate user devices).
I already use this setup :
anyconnect image disk0:/ssl/anyconnect-linux64-4.9.03047-webdeploy-k9.pkg 1 regex "Linux x86_64"
anyconnect image disk0:/ssl/anyconnect-macos-4.9.03047-webdeploy-k9.pkg 2 regex "Intel Mac OS X"
anyconnect image disk0:/ssl/anyconnect-win-4.9.01095-webdeploy-k9.pkg 3 regex "Windows NT"
If there is no match with regex , the last package is proposed to the user.
I do not own any ARM64 device but it seems that the user-agent should contain ARM64 in the user-agent string (at least ARM I guess).
For example, like this for Firefox :
Mozilla/5.0 (Windows NT 10.0; ARM64; RM-1096) AppleWebKit/537.36 (KHTML like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393
So if you use this setup, it should be able to differenciate Windows x86_64 from Windows ARM64 :
anyconnect image disk0:/anyconnect-win-arm64-4.9.03049-webdeploy-k9.pkg 1 regex "Windows NT*(ARM64)+"
anyconnect image disk0:/anyconnect-win-4.9.03049-webdeploy-k9.pkg 2 regex "Windows NT"
Hope this helps.
Regards
Jérôme
