Thank you for keeping in touch!
I do not see any UART debug related logs in the device log (the one I can open by clicking on “logs” button of the device on the ESP home page of Home Assistant or the log I see after compilation).
If you think of the following example code, I do not know where the output is supposed to be.
# Example configuration entry
uart:
baud_rate: 115200
debug:
direction: BOTH
dummy_receiver: false
after:
delimiter: "\n"
sequence:
- lambda: UARTDebug::log_string(direction, bytes);
However, I tried presence sensor LD2420 for testing and made it work (for a while, then the sensor became unknown and I was not successful in ressurecting it). However, it proved me that I can configure UART.
I also tried a third different GPS module, same result with -1.00000 output, even after a lot of minutes under the sky.