How to get private key obtained during handshake when using Fiddler Decrypt HTTPS?

Question

Cryptography

Hello! There is an application that communicates with the server using the TLS 1.2 protocol (see screenshots). To analyze application traffic, I use Fiddler, or rather its "Dectypt HTTPS traffic" function. If I understand correctly, the Diffie-Hellman protocol is used for key exchange, and further encryption of requests in the built tunnel is done using AES-128. The question arises: where to get the key with which all further requests will be encrypted?