I have a local https server on windows on my wifi net that I can access from any device on my wifi net. Unfortunately Wireshark is not decryption the conversation, that in all respects works well. The server is using x509 rsa 256 cryptation. Decryption works well for me for external https servers like Ecko (https://beeceptor.com/resources/http-echo/).
I am using Pre-Master secret file for my descryptation