Not sure if the eSupport folder will include everything you need for newer models these days since some files are only available through Microsoft Store (which will often include a link from the ASUS download site for your model when supported) or just not available through the eSupport folder and normal downloads, so you may want to try some other things too.
Switch to your region in the bottom left-hand corner if necessary, but noticed the GX502GW global download site includes an Armoury Crate download below that may help with the cpu speed issue under the 'utilities' folder if you want to look into it and be sure to click on the 'show all'.
If you haven't already, you may also want to check for updates through Armoury Crate to see if it will install it automatically for you.https://www.asus.com/Laptops/ROG-Zephyrus-S-GX502/HelpDesk_Download/
Version V6.51.371.0 2019/11/079.36 MBytes
Fix Armoury Crate unable to display correct CPU information on models with Intel CPU.
If interested, check the FAQ below about installing Armoury Crate which suggests installing "ROG Live Service pack" which is available under the GX502GW 'utilties' section if you have not installed it already.https://www.asus.com/support/FAQ/1037674
Armoury Crate FAQ:https://www.asus.com/support/FAQ/1040058
Not sure if the MyASUS software can help you install drivers and apps, but refer to the FAQ below about installing the System Control Interface driver and MyASUS software if you wish.https://www.asus.com/support/FAQ/1039713
MyASUS general FAQ:https://www.asus.com/support/FAQ/1038301