Although Microsoft originally began the rollout of the Windows 10 version 2004 on May 27, 2020, due to a number of problems with the feature update, the company implemented a temporary compatibility block on devices that could encounter these known issues.
One of these issues was errors or unexpected restarts for some computers using Always On, Always Connected network adapter, which also happens to be a feature on Surface Laptop 3 and Surface Pro 7.
However, Microsoft has made available update KB4557957, as part of the June 9 Patch Tuesday rollout, for the May 2020 Update that bumps the version number to build 19041.329 and mitigates (via ZDNet) the Always On, Always Connected problem, which means that affected Surface devices should soon start receiving the new version through Windows Update.
In theory, you should now be able to upgrade manually using the Media Creation Tool or Update Assistant and then download the latest cumulative update to resolve the issue. However, the fix seems to be in the testing phase as the company is still blocking the Windows 10 version 2004, but it’s expected to be removed in the coming weeks.