Animating scale of Inflow object doesn't work

Hey there guys, I’m trying to make fluid slowly become a trickle and then stop (ie not animate the “Use Flow” button).

So following this tutorial https://www.youtube.com/watch?v=MqFF0keVmCY&ab_channel=BlenderSecrets I see you have to animate the scale of the Inflow object over time. But I did that with my file and the flow doesn’t change (even though I used a tiny scale).

Here is my file https://pasteall.org/media/e/e/ee86d1421f3a68010d64dba204bc6821.blend if you want to check it out (from frames 1980 - 2080, since I use this in another large scene).

Have I missed something?

Thanks in advance.