I also wanted to use Dual eSIM and fell for a lousy journalist who claimed in his report that Dual eSIM is already possible (it is not, it only works in a beta version).
The function of being able to use two eSIMs (in parallel) is only available from/with the beta software version with the build number: T3B2.230316.003. To get this, you must sign up/register for the Google beta programme. The version with the build number: TQ2A.230305.008.C1.2023032600, which is on your phone, is the official software version. The Dual eSIM function cannot be used here.
As soon as we receive the so-called feature drop from Google as one of the next official updates for Android 13, SIM slot 1 can also be addressed for the installation of a second eSIM profile.
Until then, every attempt to install an eSIM will end up in SIM slot 2.
Have tried it myself several times (now use physical SIM card temporarily for Dual SIM).