try await Task.sleep(until: targetDate)

Task.swift

import Foundation

extension Task {
	static func sleep(until target: Date) async throws where Success == Never, Failure == Never {
		let duration = target.timeIntervalSinceNow
		try await Self.sleep(for: .seconds(duration))
	}
}

print("Waiting for 1s...")
try await Task.sleep(until: Date.now.addingTimeInterval(1))
print("... done.")