Joe would have a Secret Service detail even as a former VP.
Normally, but Traitor Jo is illegitimate - PresidAint and worse he’s part of a hostile Foreign takeover of the US.
I think he has forfeited any security service by the government, he couldn’t even pass a security check now.
Perhaps as far as justice is concerned, you and I might agree that he has forfeited government security, but it’s also better that “we” get him to his trial in one piece.
I confirmed Joe does have a security detail, just not the standard presidential USSS detail.