Marvell/ NXP wireless has always been problematic and 'picky', that's not news.
Not so much a fault, as a 'feature' - since the LDPC coding was 'optional' before wifi6. Maybe they just didn't implement it in that chipset.
I have noticed a drawback with this setting I have a lenovo smart clock and it seems to disconnect and reconnect periodically with the LDPC setting enabled.
See if a different SSID without that setting works, or a new SSID for the xbox with it off.
Again - this is an 11n/HT mode feature for LDPC coding, and it's optional for HT and above modes
I don't have enough radios as the settings are common for each SSID on the radio.
turning it off on the only radio on the 2.4 band causes the Xbox to not connect but the smart clock remains stable.