Patch [MDVA-41046]:

[shunmugakumaran]

This below patch is causing the issue for product adding in configurable in 2.4.6-p2 Select Associated Product. revert to old changes works fine in the local

https://experienceleague.adobe.com/docs/commerce-knowledge-base/kb/support-tools/patches/v1-1-5/mdva-41046-simple-products-with-custom-options-not-available-for-assigning.html?lang=en

Above patch is applicable only from >=2.3.0 <2.4.4 but those changes are available in 2.4.6-p2 also that is causing the issue