Mocking in XCTest unit tests

I have a 100% SWIFTUI project that uses MockingBird for mocking instances. It works pretty well, but the latest release is 2+ year and it's impossible to get help in the Slack channel. So I assume the project is dead.

What is the best alternative?

I see some ideas, but I don't want to "pollute" my production code with property wrappers etc. MockingBird solves this very well.

What mocking framework are people using these days?