Case closed. I didn't get any signal on TX pin so I surely damaged it during soldering. I assembled a new board and it works fine.

I never thought about including test points or pins for uart but it could be useful in future projects.

I could try getting a small wire or a probe on the TX pad, thank you for that idea.

Hello, I made my own PCB with ESP32-S3-Mini-1U-N8. I have an issue that it doesn't show up on my PC nor my laptop, i checked with two normal cables and one with swapped data pins. I've already made two PCBs with S3-mini, the only difference from the working ones and this one is that it's a 4 layer ...