Yes the AI thinks the Max has lead screws.
I have 3 bed slingers and gave up on printing fast with either of them so this is my first deep look at input shaping. I do follow all the traffic at General Discussion - Klipper. There has been on and off discussions on Z axis input shaping. Most that try it report no noticeable improvement in surface finish but say there is an improvement in the noise generated for Z moves.
If ever there was a printer that could benefit it is the Max. Sovol made the gantry wider but used the same extrusions. There is NO QUESTION the Max is going to have a lower resonance frequency in the Z axis. When you consider the increase in displacement that lower frequencies drive the movement is likely to be large enough to create visible artifacts.
I do see documentation of damping_ratios as high as .2 for the Y axis at Input Shaping and Resonance Compensation | Klipper3d/klipper | DeepWiki. My gut says .3 or .35 is not unreasonable for Z on the Max.