Most likely cause, both for you and maybe others above too:
TX and RX stand for transmit and receive. When you connect them to another device, tying TX to TX and RX to RX won’t work, because both devices send on the same line, and both devices listen on the same line. Those need to be swapped. If one side transmits (TX) the other side must listen (RX) on both lines.
So: swap pin 1 and 3 and try again. It will probably work.
Another thing to note:
If you have an ESb32 device with a USB port, then the USB almost always also uses pin 1 and 3 for serial communication. So, while you flash over USB, don’t connect the LD2410 to the same pins (that is one of the reasons why another uart might be more convenient).
Once you flashed and discunnect USB from a PC (an adapter is fine, that won’t use the uart). Now you can connect to pins 1 and 3, and do firmware updates OTA.
And last but not least, if you post yaml, format it correctly, between three backticks: