If you code in GDScript it works well. I used C# because that's what I'm comfortable with. You can't export to web if you coded in C#... I would have had to completely recode the project
Yeah, it works in godot3 BUT they've not got the .net working yet in Godot 4 sadly. It's on their "to-do" list BUT sadly I didn't realize it. I started trying to get things ported into GD script today to see if I could get a web version up BUT that was going to take an almost complete re-write of my game manger. Live an learn.