ESP32 with microphone and speaker project

My capstone group is making an audio loop system and our main components are two esp32’s, a speaker and microphone. We used the code from the “Sound with ESP32- I2S protocol”. The microphone we are using is the same as the project, the INM441 and have that connection working. We are using two ESP32 to communicate to each to send the audio signal from the microphone to the speaker. Theoretically these will be separated throughout the room, one will be with the teacher who is speaking into the microphone and another in a classroom with a hearing impaired student. I will include the schematic for our project for better understanding. We think the problem is between the two esp32s but would appreciate any insight. We originally wanted to use Bluetooth for the esp to output to the speaker but we don’t have a lot of knowledge in this area and couldn’t get that to work. I can upload the code as well if that in necessary. https://buckeyemailosu-my.sharepoint.com/:b:/g/personal/adkins_671_buckeyemail_osu_edu/EVZ-ybOThQNBjWlkiCRLhi8Bf_KXyqWWSQIbPcA6KQ16vw?e=T5Ceay