It has been reported that EDL will not start by this method when fastboot is accessible.
Edit Hi @JamesM I have collected a few OnePlus bookmarks. This link is a more comprehensive [Guide] How to use MSM tool.
This link is from the Community server mentioned https://onepluscommunityserver.com/list/Unbrick_Tools/. It will vary – several variants for nord – but there are methods given for achieving EDL on a Fastboot capable device.
Without using EDL:
As OnePlus doesn’t always provide download links for all of their OxygenOS ROMs & OTA update zips, we’ve created an index to put the links in one post so that they’re easy to find:
try this link https://xdaforums.com/t/oneplus-nord-rom-ota-oxygen-os-repo-of-oxygen-os-builds.4138085/