Two MAX10 FPGAs, one sends packets and the other doesn't.

I will answer in passing.

I think you know, but if you just look at the content and explain it,

The FPGA sends packets, but the other side does not transmit or is not connected.

first

0x7c aOctetsReceivedOK 0

In this case, the problems are widespread.

RX link defective (physical)

Interprotocol Differences

Destination address issues (MAC Address, etc.?)

Please try connecting to a board (equipment) that is connected normally.

It seems like we can find out if the problem is with that port.

I hope it helps you with your work.
First, you need to check whether the physical channel problem is normal.