Yes and no. I’ve seen people roughly port smaller games over in a single weekend. I’d probably take a guess of about 1-2 weeks, not multiple months. Godot is surprisingly similar. Obviously it’s not all gonna be best practice, but since it also supports c#, you can more or less just copy and paste the code and slowly sift through compiler errors, replacing old Unity stuff with new Godot stuff. It’s a pain, but not quite as much as you’d expect

Take a read for yourself: Brian Bucklew porting Caves of Qud from Unity to Godot