I tried using DPDK telemetry with the X710 network card, and it was
indeed able to retrieve all xstat statistics. However, there seems to
be an issue with retrieving xstat data from the Wangxun network card
using the txgbe driver.
This might be an issue with the specific driver.

X710 i40e driver:
--> /ethdev/xstats,0
{
  "/ethdev/xstats": {
    "rx_good_packets": 4158196,
    "tx_good_packets": 817922,
    "rx_good_bytes": 307686767,
    "tx_good_bytes": 64879395,
    "rx_missed_errors": 0,
    "rx_errors": 0,
    "tx_errors": 0,
    "rx_mbuf_allocation_errors": 0,
    "rx_unicast_packets": 804771,
    "rx_multicast_packets": 387605,
    "rx_broadcast_packets": 2947488,
    "rx_dropped_packets": 0,
    "rx_unknown_protocol_packets": 4158200,
    "rx_size_error_packets": 0,
    "tx_unicast_packets": 799583,
    "tx_multicast_packets": 18288,
    "tx_broadcast_packets": 51,
    "tx_dropped_packets": 0,
    "tx_link_down_dropped": 0,
    "rx_crc_errors": 0,
    "rx_illegal_byte_errors": 0,
    "rx_error_bytes": 0,
    "mac_local_errors": 1,
    "mac_remote_errors": 1,
    "rx_length_errors": 0,
    "tx_xon_packets": 0,
    "rx_xon_packets": 0,
    "tx_xoff_packets": 0,
    "rx_xoff_packets": 0,
    "rx_size_64_packets": 546485,
    "rx_size_65_to_127_packets": 3542514,
    "rx_size_128_to_255_packets": 18619,
    "rx_size_256_to_511_packets": 18319,
    "rx_size_512_to_1023_packets": 8458,
    "rx_size_1024_to_1522_packets": 5469,
    "rx_size_1523_to_max_packets": 0,
    "rx_undersized_errors": 0,
    "rx_oversize_errors": 0,
    "rx_mac_short_dropped": 0,
    "rx_fragmented_errors": 0,
    "rx_jabber_errors": 0,
    "tx_size_64_packets": 198245,
    "tx_size_65_to_127_packets": 599690,
    "tx_size_128_to_255_packets": 19645,
    "tx_size_256_to_511_packets": 236,
    "tx_size_512_to_1023_packets": 53,
    "tx_size_1024_to_1522_packets": 53,
    "tx_size_1523_to_max_packets": 0,
    "rx_flow_director_atr_match_packets": 0,
    "rx_flow_director_sb_match_packets": 378618,
    "tx_low_power_idle_status": 0,
    "rx_low_power_idle_status": 0,
    "tx_low_power_idle_count": 0,
    "rx_low_power_idle_count": 0,
    "rx_priority0_xon_packets": 0,
    "rx_priority1_xon_packets": 0,
    "rx_priority2_xon_packets": 0,
    "rx_priority3_xon_packets": 0,
    "rx_priority4_xon_packets": 0,
    "rx_priority5_xon_packets": 0,
    "rx_priority6_xon_packets": 0,
    "rx_priority7_xon_packets": 0,
    "rx_priority0_xoff_packets": 0,
    "rx_priority1_xoff_packets": 0,
    "rx_priority2_xoff_packets": 0,
    "rx_priority3_xoff_packets": 0,
    "rx_priority4_xoff_packets": 0,
    "rx_priority5_xoff_packets": 0,
    "rx_priority6_xoff_packets": 0,
    "rx_priority7_xoff_packets": 0,
    "tx_priority0_xon_packets": 0,
    "tx_priority1_xon_packets": 0,
    "tx_priority2_xon_packets": 0,
    "tx_priority3_xon_packets": 0,
    "tx_priority4_xon_packets": 0,
    "tx_priority5_xon_packets": 0,
    "tx_priority6_xon_packets": 0,
    "tx_priority7_xon_packets": 0,
    "tx_priority0_xoff_packets": 0,
    "tx_priority1_xoff_packets": 0,
    "tx_priority2_xoff_packets": 0,
    "tx_priority3_xoff_packets": 0,
    "tx_priority4_xoff_packets": 0,
    "tx_priority5_xoff_packets": 0,
    "tx_priority6_xoff_packets": 0,
    "tx_priority7_xoff_packets": 0,
    "tx_priority0_xon_to_xoff_packets": 0,
    "tx_priority1_xon_to_xoff_packets": 0,
    "tx_priority2_xon_to_xoff_packets": 0,
    "tx_priority3_xon_to_xoff_packets": 0,
    "tx_priority4_xon_to_xoff_packets": 0,
    "tx_priority5_xon_to_xoff_packets": 0,
    "tx_priority6_xon_to_xoff_packets": 0,
    "tx_priority7_xon_to_xoff_packets": 0
  }
}

wangxun  txgbe driver:
--> /ethdev/xstats,0
{
  "/ethdev/xstats": {
    "rx_good_packets": 28224,
    "tx_good_packets": 110,
    "rx_good_bytes": 3048375,
    "tx_good_bytes": 13640,
    "rx_missed_errors": 0,
    "rx_errors": 0,
    "tx_errors": 0,
    "rx_mbuf_allocation_errors": 0
  }
}