@EA_Atic
Here's a list of troubleshooting steps requested by EA help staff in no particular order:
-reset alternate MAC address
-opened all ports as per recommendation
-confirmed hardwired connection
-confirmed NAT is open.
-changed to Google DNS, later changed to another DNS starting with 208... etc
-uninstalled/reinstalled NHL 20.
-deleted any saved game data.
-performed UOTrace route on my network, gave results to EA help tech who stated the results were good.
-connected my console to hotspot from my cell phone, still experienced the same issues.
-connected my console to hotspot on my work cell phone, still experienced the same issues.
-tried a friend's gamertag on my console, still experienced the same issues.
-made a new gamertag and even purchased a month of EA access at the recommendation of EA help tech. Couldn't get EA access to load.
-my friend tried my gamertag on his console, it worked with no issue.
-factory reset console.
-uninstalled/reinstalled NHL 20.
-confirmed with ISP that router's firmware is up to date.
EDIT:
-also tried recommended steps by other users here, including deleting persistent data on DVD menu.
No issues playing any other game, including NHL 19.