They are likely still technically in effect, but are largely irrelevant
The Avengers don't seem to really exist as an entity any more, five years after the snap. Iron Man has retired to raise a family, Thor sits around getting drunk and playing video games all day. Hawkeye has become a loner vigilante, and Hulk seems to have become pretty nonviolent (plus he spent a long time shut away, "fixing" his condition).
In Black Widow's holographic conference call, we see:
-Okoye, who is not subject to the Sokovia accords: She's the commander of the Wakandan military, not an Avenger.
-Rocket, Nebula, and Captain Marvel, all of whose actions are somewhat out of the jurisdiction of the Sokovia accords.
-War Machine, who works for the US military and is presumably acting under their authority.
That leaves Black Widow and Captain America. They were both fugitives as of Infinity War, and there's been no indication that status has changed. However, it seems incredibly likely that, with the world in shambles after the snap, there are no government agencies spending resources on actively pursuing them - there are a huge number of higher priorities for them to deal with.
It's reasonable to assume that most people in power are happier with Cap and Widow out there, doing their best to maintain some semblance of peace and order. So even if they are technically still wanted, in practice they probably have a lot of leeway in their operations.