Limit Distance constraint problem ?

I don’t know if its just me or if there is a problem with 2.9; but wen I try to put a limit distance constraint on a basic wrist joint as shown in the Frank tutorial it doesn’t work at all.

The rig is a metarig from the riggify add on.

Hope every one is well.

?? ?

Here is the packed file.

where is the limit distance constraint on the rig?

I took it of and replaced it with a hand bone to twist the hand.