Newish Idler arm has a lot of slack/wobble

Plumcrazyreindeer said

I’ll take a look at that up close and see if I can persuade it to get right. The bushing on that arm is a soft foam like material around the metal inner tube that the bolt goes through. That’s where it gets movement from. The bushing on the old one is a hard rubber

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Those foam and hard rubber parts are not bushings, but basically just dust covers and if you are real serious about getting rid of any vertical play in the idler arm they make a bearing kit to replace the inside parts with kind of like this.
I don't know who carries them though.